61156171560 has 128 divisors (see below), whose sum is σ = 203135040000. Its totient is φ = 14604437760.

The previous prime is 61156171553. The next prime is 61156171577. The reversal of 61156171560 is 6517165116.

61156171560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257310 + ... + 434189.

It is an arithmetic number, because the mean of its divisors is an integer number (1586992500).

Almost surely, 2^61156171560 is an apocalyptic number.

61156171560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61156171560 is an abundant number, since it is smaller than the sum of its proper divisors (141978868440).

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

61156171560 is a wasteful number, since it uses less digits than its factorization.

61156171560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691591 (or 691587 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 39.

The spelling of 61156171560 in words is "sixty-one billion, one hundred fifty-six million, one hundred seventy-one thousand, five hundred sixty".