77489593856 has 40 divisors (see below), whose sum is σ = 155606074800. Its totient is φ = 38550048768.

The previous prime is 77489593837. The next prime is 77489593879. The reversal of 77489593856 is 65839598477.

It is a self number, because there is not a number n which added to its sum of digits gives 77489593856.

It is a congruent number.

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, 278381 + ... + 482156.

It is an arithmetic number, because the mean of its divisors is an integer number (3890151870).

Almost surely, 2^77489593856 is an apocalyptic number.

It is an amenable number.

77489593856 is an abundant number, since it is smaller than the sum of its proper divisors (78116480944).

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

77489593856 is an equidigital number, since it uses as much as digits as its factorization.

77489593856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760754 (or 760738 counting only the distinct ones).

The product of its digits is 457228800, while the sum is 71.

The spelling of 77489593856 in words is "seventy-seven billion, four hundred eighty-nine million, five hundred ninety-three thousand, eight hundred fifty-six".