77275552500 has 120 divisors (see below), whose sum is σ = 250350112320. Its totient is φ = 20606796000.

The previous prime is 77275552483. The next prime is 77275552531. The reversal of 77275552500 is 525557277.

77275552500 is a `hidden beast` number, since 7 + 72 + 7 + 55 + 525 + 0 + 0 = 666.

It is a super-2 number, since 2×77275552500² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 504912 + ... + 639911.

It is an arithmetic number, because the mean of its divisors is an integer number (2086250936).

Almost surely, 2^77275552500 is an apocalyptic number.

It is an amenable number.

77275552500 is an abundant number, since it is smaller than the sum of its proper divisors (173074559820).

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

77275552500 is a wasteful number, since it uses less digits than its factorization.

77275552500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144856 (or 1144833 counting only the distinct ones).

The product of its (nonzero) digits is 857500, while the sum is 45.

The spelling of 77275552500 in words is "seventy-seven billion, two hundred seventy-five million, five hundred fifty-two thousand, five hundred".