61896639973760 has 64 divisors (see below), whose sum is σ = 147997546431120. Its totient is φ = 24754323818496.

The previous prime is 61896639973759. The next prime is 61896639973771. The reversal of 61896639973760 is 6737993669816.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (80).

It is a congruent number.

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, 4799534 + ... + 12117293.

Almost surely, 2^{61896639973760} is an apocalyptic number.

It is an amenable number.

61896639973760 is an abundant number, since it is smaller than the sum of its proper divisors (86100906457360).

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

61896639973760 is a wasteful number, since it uses less digits than its factorization.

61896639973760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16922563 (or 16922551 counting only the distinct ones).

The product of its (nonzero) digits is 3333197952, while the sum is 80.

The spelling of 61896639973760 in words is "sixty-one trillion, eight hundred ninety-six billion, six hundred thirty-nine million, nine hundred seventy-three thousand, seven hundred sixty".