61516861516 has 12 divisors (see below), whose sum is σ = 117441281160. Its totient is φ = 27962209760.

The previous prime is 61516861493. The next prime is 61516861529.

It is a happy number.

61516861516 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699055201 + ... + 699055288.

It is an arithmetic number, because the mean of its divisors is an integer number (9786773430).

Almost surely, 2^61516861516 is an apocalyptic number.

It is an amenable number.

61516861516 is a deficient number, since it is larger than the sum of its proper divisors (55924419644).

61516861516 is a wasteful number, since it uses less digits than its factorization.

61516861516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398110504 (or 1398110502 counting only the distinct ones).

The product of its digits is 259200, while the sum is 46.

The spelling of 61516861516 in words is "sixty-one billion, five hundred sixteen million, eight hundred sixty-one thousand, five hundred sixteen".