155651654132440 has 64 divisors (see below), whose sum is σ = 381360677148000. Its totient is φ = 56949861104640.

The previous prime is 155651654132423. The next prime is 155651654132441. The reversal of 155651654132440 is 44231456156551.

It is a happy number.

It is a super-2 number, since 2×155651654132440² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155651654132441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3531095341 + ... + 3531139420.

Almost surely, 2^{155651654132440} is an apocalyptic number.

155651654132440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155651654132440 is an abundant number, since it is smaller than the sum of its proper divisors (225709023015560).

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

155651654132440 is a wasteful number, since it uses less digits than its factorization.

155651654132440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7062234820 (or 7062234816 counting only the distinct ones).

The product of its (nonzero) digits is 8640000, while the sum is 52.

The spelling of 155651654132440 in words is "one hundred fifty-five trillion, six hundred fifty-one billion, six hundred fifty-four million, one hundred thirty-two thousand, four hundred forty".