61399620969600 has 192 divisors, whose sum is σ = 212878949652000. Its totient is φ = 15511483146240.

The previous prime is 61399620969587. The next prime is 61399620969601. The reversal of 61399620969600 is 696902699316.

It is a tau number, because it is divible by the number of its divisors (192).

It is not an unprimeable number, because it can be changed into a prime (61399620969601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168127965 + ... + 168492764.

Almost surely, 2^{61399620969600} is an apocalyptic number.

61399620969600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61399620969600 is an abundant number, since it is smaller than the sum of its proper divisors (151479328682400).

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

61399620969600 is a wasteful number, since it uses less digits than its factorization.

61399620969600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336620775 (or 336620758 counting only the distinct ones).

The product of its (nonzero) digits is 51018336, while the sum is 66.

The spelling of 61399620969600 in words is "sixty-one trillion, three hundred ninety-nine billion, six hundred twenty million, nine hundred sixty-nine thousand, six hundred".