810980078520 has 64 divisors (see below), whose sum is σ = 2446381959840. Its totient is φ = 215066534400.

The previous prime is 810980078431. The next prime is 810980078543. The reversal of 810980078520 is 25870089018.

It is a self number, because there is not a number n which added to its sum of digits gives 810980078520.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18647251 + ... + 18690690.

Almost surely, 2^810980078520 is an apocalyptic number.

It is an amenable number.

810980078520 is an abundant number, since it is smaller than the sum of its proper divisors (1635401881320).

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

810980078520 is a wasteful number, since it uses less digits than its factorization.

810980078520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37338136 (or 37338132 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 48.

The spelling of 810980078520 in words is "eight hundred ten billion, nine hundred eighty million, seventy-eight thousand, five hundred twenty".