61516588012 has 48 divisors (see below), whose sum is σ = 118299767040. Its totient is φ = 27758116800.

The previous prime is 61516588009. The next prime is 61516588027. The reversal of 61516588012 is 21088561516.

It is a super-2 number, since 2×61516588012² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61516588012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4668289 + ... + 4681447.

It is an arithmetic number, because the mean of its divisors is an integer number (2464578480).

Almost surely, 2^61516588012 is an apocalyptic number.

It is an amenable number.

61516588012 is a deficient number, since it is larger than the sum of its proper divisors (56783179028).

61516588012 is a wasteful number, since it uses less digits than its factorization.

61516588012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13942 (or 13940 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 43.

The spelling of 61516588012 in words is "sixty-one billion, five hundred sixteen million, five hundred eighty-eight thousand, twelve".