77899689934 has 32 divisors (see below), whose sum is σ = 135008910432. Its totient is φ = 33316608000.

The previous prime is 77899689919. The next prime is 77899689949. The reversal of 77899689934 is 43998699877.

It is an interprime number because it is at equal distance from previous prime (77899689919) and next prime (77899689949).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1378924 + ... + 1434304.

It is an arithmetic number, because the mean of its divisors is an integer number (4219028451).

Almost surely, 2^77899689934 is an apocalyptic number.

77899689934 is a deficient number, since it is larger than the sum of its proper divisors (57109220498).

77899689934 is a wasteful number, since it uses less digits than its factorization.

77899689934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59172.

The product of its digits is 1481421312, while the sum is 79.

The spelling of 77899689934 in words is "seventy-seven billion, eight hundred ninety-nine million, six hundred eighty-nine thousand, nine hundred thirty-four".