78206881700 has 36 divisors (see below), whose sum is σ = 170689947540. Its totient is φ = 31101920640.

The previous prime is 78206881693. The next prime is 78206881733. The reversal of 78206881700 is 718860287.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 8110083136 + 70096798564 = 90056^2 + 264758^2 .

It is a super-2 number, since 2×78206881700² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2243015 + ... + 2277614.

Almost surely, 2^78206881700 is an apocalyptic number.

It is an amenable number.

78206881700 is an abundant number, since it is smaller than the sum of its proper divisors (92483065840).

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

78206881700 is a wasteful number, since it uses less digits than its factorization.

78206881700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520816 (or 4520809 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 47.

The spelling of 78206881700 in words is "seventy-eight billion, two hundred six million, eight hundred eighty-one thousand, seven hundred".