561500532156 has 48 divisors (see below), whose sum is σ = 1392511405824. Its totient is φ = 175487214336.

The previous prime is 561500532149. The next prime is 561500532157. The reversal of 561500532156 is 651235005165.

It is a super-2 number, since 2×561500532156² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561500532157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5179150 + ... + 5286453.

It is an arithmetic number, because the mean of its divisors is an integer number (29010654288).

Almost surely, 2^561500532156 is an apocalyptic number.

It is an amenable number.

561500532156 is an abundant number, since it is smaller than the sum of its proper divisors (831010873668).

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

561500532156 is a wasteful number, since it uses less digits than its factorization.

561500532156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10465890 (or 10465888 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 561500532156 in words is "five hundred sixty-one billion, five hundred million, five hundred thirty-two thousand, one hundred fifty-six".