77800075500 has 96 divisors (see below), whose sum is σ = 258918686208. Its totient is φ = 17782872000.

The previous prime is 77800075489. The next prime is 77800075511. The reversal of 77800075500 is 557000877.

It is an interprime number because it is at equal distance from previous prime (77800075489) and next prime (77800075511).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3694266 + ... + 3715265.

It is an arithmetic number, because the mean of its divisors is an integer number (2697069648).

Almost surely, 2^77800075500 is an apocalyptic number.

77800075500 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77800075500 is an abundant number, since it is smaller than the sum of its proper divisors (181118610708).

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

77800075500 is a wasteful number, since it uses less digits than its factorization.

77800075500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7409560 (or 7409548 counting only the distinct ones).

The product of its (nonzero) digits is 68600, while the sum is 39.

The spelling of 77800075500 in words is "seventy-seven billion, eight hundred million, seventy-five thousand, five hundred".