155725056251656 has 128 divisors (see below), whose sum is σ = 314749538933760. Its totient is φ = 71970103296000.

The previous prime is 155725056251599. The next prime is 155725056251657. The reversal of 155725056251656 is 656152650527551.

It is a junction number, because it is equal to n+sod(n) for n = 155725056251594 and 155725056251603.

It is not an unprimeable number, because it can be changed into a prime (155725056251657) 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, 1898327361 + ... + 1898409391.

It is an arithmetic number, because the mean of its divisors is an integer number (2458980772920).

Almost surely, 2^{155725056251656} is an apocalyptic number.

It is an amenable number.

155725056251656 is an abundant number, since it is smaller than the sum of its proper divisors (159024482682104).

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

155725056251656 is a wasteful number, since it uses less digits than its factorization.

155725056251656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83255 (or 83251 counting only the distinct ones).

The product of its (nonzero) digits is 94500000, while the sum is 61.

The spelling of 155725056251656 in words is "one hundred fifty-five trillion, seven hundred twenty-five billion, fifty-six million, two hundred fifty-one thousand, six hundred fifty-six".