155232444440 has 64 divisors (see below), whose sum is σ = 351456019200. Its totient is φ = 61705348992.

The previous prime is 155232444439. The next prime is 155232444443. The reversal of 155232444440 is 44444232551.

It is a super-2 number, since 2×155232444440² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155232444394 and 155232444403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155232444443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12330389 + ... + 12342971.

It is an arithmetic number, because the mean of its divisors is an integer number (5491500300).

Almost surely, 2^155232444440 is an apocalyptic number.

155232444440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155232444440 is an abundant number, since it is smaller than the sum of its proper divisors (196223574760).

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

155232444440 is a wasteful number, since it uses less digits than its factorization.

155232444440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14496 (or 14492 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 38.

Adding to 155232444440 its reverse (44444232551), we get a palindrome (199676676991).

The spelling of 155232444440 in words is "one hundred fifty-five billion, two hundred thirty-two million, four hundred forty-four thousand, four hundred forty".