61596899712 has 96 divisors (see below), whose sum is σ = 183816458280. Its totient is φ = 20532289536.

The previous prime is 61596899711. The next prime is 61596899717. The reversal of 61596899712 is 21799869516.

61596899712 is a `hidden beast` number, since 615 + 9 + 6 + 8 + 9 + 9 + 7 + 1 + 2 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 61596899712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61596899711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 959073 + ... + 1021280.

Almost surely, 2^61596899712 is an apocalyptic number.

It is an amenable number.

61596899712 is an abundant number, since it is smaller than the sum of its proper divisors (122219558568).

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

61596899712 is an equidigital number, since it uses as much as digits as its factorization.

61596899712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980382 (or 1980358 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 63.

The spelling of 61596899712 in words is "sixty-one billion, five hundred ninety-six million, eight hundred ninety-nine thousand, seven hundred twelve".