77215693436 has 24 divisors (see below), whose sum is σ = 158198008416. Its totient is φ = 32285306880.

The previous prime is 77215693427. The next prime is 77215693441. The reversal of 77215693436 is 63439651277.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33629381 + ... + 33631676.

It is an arithmetic number, because the mean of its divisors is an integer number (6591583684).

Almost surely, 2^77215693436 is an apocalyptic number.

It is an amenable number.

77215693436 is an abundant number, since it is smaller than the sum of its proper divisors (80982314980).

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

77215693436 is a wasteful number, since it uses less digits than its factorization.

77215693436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67261109 (or 67261107 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 53.

The spelling of 77215693436 in words is "seventy-seven billion, two hundred fifteen million, six hundred ninety-three thousand, four hundred thirty-six".