155860087656 has 128 divisors (see below), whose sum is σ = 480640608000. Its totient is φ = 41014149120.

The previous prime is 155860087609. The next prime is 155860087657. The reversal of 155860087656 is 656780068551.

It is a junction number, because it is equal to n+sod(n) for n = 155860087596 and 155860087605.

It is not an unprimeable number, because it can be changed into a prime (155860087657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 901146 + ... + 1060086.

It is an arithmetic number, because the mean of its divisors is an integer number (3755004750).

Almost surely, 2^155860087656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155860087656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240320304000).

155860087656 is an abundant number, since it is smaller than the sum of its proper divisors (324780520344).

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

155860087656 is a wasteful number, since it uses less digits than its factorization.

155860087656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159419 (or 159415 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 57.

The spelling of 155860087656 in words is "one hundred fifty-five billion, eight hundred sixty million, eighty-seven thousand, six hundred fifty-six".