561601600156 has 12 divisors (see below), whose sum is σ = 982830402792. Its totient is φ = 280792913648.

The previous prime is 561601600139. The next prime is 561601600177. The reversal of 561601600156 is 651006106165.

It is a congruent number.

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, 1809910 + ... + 2097373.

It is an arithmetic number, because the mean of its divisors is an integer number (81902533566).

Almost surely, 2^561601600156 is an apocalyptic number.

It is an amenable number.

561601600156 is a deficient number, since it is larger than the sum of its proper divisors (421228802636).

561601600156 is a wasteful number, since it uses less digits than its factorization.

561601600156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3943220 (or 3943218 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 561601600156 in words is "five hundred sixty-one billion, six hundred one million, six hundred thousand, one hundred fifty-six".