155342334002440 has 128 divisors (see below), whose sum is σ = 378583543185120. Its totient is φ = 57025581465600.

The previous prime is 155342334002327. The next prime is 155342334002497. The reversal of 155342334002440 is 44200433243551.

It can be written as a sum of positive squares in 16 ways, for example, as 5899972988196 + 149442361014244 = 2428986^2 + 12224662^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 155342334002393 and 155342334002402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 368457360 + ... + 368878720.

Almost surely, 2^{155342334002440} is an apocalyptic number.

155342334002440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155342334002440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189291771592560).

155342334002440 is an abundant number, since it is smaller than the sum of its proper divisors (223241209182680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155342334002440 is a wasteful number, since it uses less digits than its factorization.

155342334002440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425483 (or 425479 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 40.

Adding to 155342334002440 its reverse (44200433243551), we get a palindrome (199542767245991).

The spelling of 155342334002440 in words is "one hundred fifty-five trillion, three hundred forty-two billion, three hundred thirty-four million, two thousand, four hundred forty".