155216501656 has 8 divisors (see below), whose sum is σ = 291030940620. Its totient is φ = 77608250824.

The previous prime is 155216501623. The next prime is 155216501683. The reversal of 155216501656 is 656105612551.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9701031346 + ... + 9701031361.

Almost surely, 2^155216501656 is an apocalyptic number.

It is an amenable number.

155216501656 is a deficient number, since it is larger than the sum of its proper divisors (135814438964).

155216501656 is a wasteful number, since it uses less digits than its factorization.

155216501656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19402062713 (or 19402062709 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 43.

The spelling of 155216501656 in words is "one hundred fifty-five billion, two hundred sixteen million, five hundred one thousand, six hundred fifty-six".