201515026640556 has 12 divisors (see below), whose sum is σ = 470201728827992. Its totient is φ = 67171675546848.

The previous prime is 201515026640539. The next prime is 201515026640593. The reversal of 201515026640556 is 655046620515102.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8396459443345 + ... + 8396459443368.

Almost surely, 2^{201515026640556} is an apocalyptic number.

It is an amenable number.

201515026640556 is an abundant number, since it is smaller than the sum of its proper divisors (268686702187436).

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

201515026640556 is a wasteful number, since it uses less digits than its factorization.

201515026640556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16792918886720 (or 16792918886718 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 48.

The spelling of 201515026640556 in words is "two hundred one trillion, five hundred fifteen billion, twenty-six million, six hundred forty thousand, five hundred fifty-six".