61561017160 has 32 divisors (see below), whose sum is σ = 138520238400. Its totient is φ = 24622993600.

The previous prime is 61561017107. The next prime is 61561017187. The reversal of 61561017160 is 6171016516.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 922935 + ... + 987385.

It is an arithmetic number, because the mean of its divisors is an integer number (4328757450).

Almost surely, 2^61561017160 is an apocalyptic number.

It is an amenable number.

61561017160 is an abundant number, since it is smaller than the sum of its proper divisors (76959221240).

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

61561017160 is a wasteful number, since it uses less digits than its factorization.

61561017160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88341 (or 88337 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 34.

The spelling of 61561017160 in words is "sixty-one billion, five hundred sixty-one million, seventeen thousand, one hundred sixty".