77525550808 has 16 divisors (see below), whose sum is σ = 145437878880. Its totient is φ = 38742116448.

The previous prime is 77525550799. The next prime is 77525550827. The reversal of 77525550808 is 80805552577.

It is a super-2 number, since 2×77525550808² (a number of 23 digits) contains 22 as substring.

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, 2566416 + ... + 2596447.

It is an arithmetic number, because the mean of its divisors is an integer number (9089867430).

Almost surely, 2^77525550808 is an apocalyptic number.

It is an amenable number.

77525550808 is a deficient number, since it is larger than the sum of its proper divisors (67912328072).

77525550808 is a wasteful number, since it uses less digits than its factorization.

77525550808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5164746 (or 5164742 counting only the distinct ones).

The product of its (nonzero) digits is 3920000, while the sum is 52.

The spelling of 77525550808 in words is "seventy-seven billion, five hundred twenty-five million, five hundred fifty thousand, eight hundred eight".