155372116440 has 32 divisors (see below), whose sum is σ = 466116349680. Its totient is φ = 41432564352.

The previous prime is 155372116421. The next prime is 155372116463. The reversal of 155372116440 is 44611273551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647383699 + ... + 647383938.

Almost surely, 2^155372116440 is an apocalyptic number.

155372116440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155372116440 is an abundant number, since it is smaller than the sum of its proper divisors (310744233240).

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

155372116440 is a wasteful number, since it uses less digits than its factorization.

155372116440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294767651 (or 1294767647 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

Adding to 155372116440 its reverse (44611273551), we get a palindrome (199983389991).

The spelling of 155372116440 in words is "one hundred fifty-five billion, three hundred seventy-two million, one hundred sixteen thousand, four hundred forty".