77641451986 has 16 divisors (see below), whose sum is σ = 133470391680. Its totient is φ = 33182218080.

The previous prime is 77641451959. The next prime is 77641452017. The reversal of 77641451986 is 68915414677.

It is a self number, because there is not a number n which added to its sum of digits gives 77641451986.

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, 7718955 + ... + 7729006.

It is an arithmetic number, because the mean of its divisors is an integer number (8341899480).

Almost surely, 2^77641451986 is an apocalyptic number.

77641451986 is a deficient number, since it is larger than the sum of its proper divisors (55828939694).

77641451986 is a wasteful number, since it uses less digits than its factorization.

77641451986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15448329.

The product of its digits is 10160640, while the sum is 58.

The spelling of 77641451986 in words is "seventy-seven billion, six hundred forty-one million, four hundred fifty-one thousand, nine hundred eighty-six".