77217075808 has 24 divisors (see below), whose sum is σ = 154162265040. Its totient is φ = 38064754560.

The previous prime is 77217075791. The next prime is 77217075811. The reversal of 77217075808 is 80857071277.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16990923 + ... + 16995466.

It is an arithmetic number, because the mean of its divisors is an integer number (6423427710).

Almost surely, 2^77217075808 is an apocalyptic number.

It is an amenable number.

77217075808 is a deficient number, since it is larger than the sum of its proper divisors (76945189232).

77217075808 is a wasteful number, since it uses less digits than its factorization.

77217075808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33986470 (or 33986462 counting only the distinct ones).

The product of its (nonzero) digits is 1536640, while the sum is 52.

The spelling of 77217075808 in words is "seventy-seven billion, two hundred seventeen million, seventy-five thousand, eight hundred eight".