80777809400 has 24 divisors (see below), whose sum is σ = 187808407320. Its totient is φ = 32311123680.

The previous prime is 80777809351. The next prime is 80777809421. The reversal of 80777809400 is 490877708.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201944324 + ... + 201944723.

It is an arithmetic number, because the mean of its divisors is an integer number (7825350305).

Almost surely, 2^80777809400 is an apocalyptic number.

It is an amenable number.

80777809400 is an abundant number, since it is smaller than the sum of its proper divisors (107030597920).

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

80777809400 is a wasteful number, since it uses less digits than its factorization.

80777809400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403889063 (or 403889054 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 50.

The spelling of 80777809400 in words is "eighty billion, seven hundred seventy-seven million, eight hundred nine thousand, four hundred".