61515670560 has 96 divisors (see below), whose sum is σ = 195655824000. Its totient is φ = 16244901888.

The previous prime is 61515670553. The next prime is 61515670583. The reversal of 61515670560 is 6507651516.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572685 + ... + 671564.

It is an arithmetic number, because the mean of its divisors is an integer number (2038081500).

Almost surely, 2^61515670560 is an apocalyptic number.

61515670560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61515670560 is an abundant number, since it is smaller than the sum of its proper divisors (134140153440).

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

61515670560 is a wasteful number, since it uses less digits than its factorization.

61515670560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244370 (or 1244362 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 42.

The spelling of 61515670560 in words is "sixty-one billion, five hundred fifteen million, six hundred seventy thousand, five hundred sixty".