201086155656 has 48 divisors (see below), whose sum is σ = 552068740860. Its totient is φ = 66110515200.

The previous prime is 201086155651. The next prime is 201086155657. The reversal of 201086155656 is 656551680102.

201086155656 is a `hidden beast` number, since 2 + 0 + 1 + 0 + 86 + 1 + 5 + 565 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 189428634756 + 11657520900 = 435234^2 + 107970^2 .

It is not an unprimeable number, because it can be changed into a prime (201086155651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19123945 + ... + 19134456.

Almost surely, 2^201086155656 is an apocalyptic number.

It is an amenable number.

201086155656 is an abundant number, since it is smaller than the sum of its proper divisors (350982585204).

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

201086155656 is a wasteful number, since it uses less digits than its factorization.

201086155656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38258486 (or 38258479 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 201086155656 in words is "two hundred one billion, eighty-six million, one hundred fifty-five thousand, six hundred fifty-six".