812255580978 has 32 divisors (see below), whose sum is σ = 1658117148480. Its totient is φ = 265207726080.

The previous prime is 812255580967. The next prime is 812255580979. The reversal of 812255580978 is 879085552218.

812255580978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (812255580979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7050703 + ... + 7164978.

It is an arithmetic number, because the mean of its divisors is an integer number (51816160890).

Almost surely, 2^812255580978 is an apocalyptic number.

812255580978 is an abundant number, since it is smaller than the sum of its proper divisors (845861567502).

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

812255580978 is a wasteful number, since it uses less digits than its factorization.

812255580978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14215882.

The product of its (nonzero) digits is 16128000, while the sum is 60.

The spelling of 812255580978 in words is "eight hundred twelve billion, two hundred fifty-five million, five hundred eighty thousand, nine hundred seventy-eight".