812947274880 has 128 divisors (see below), whose sum is σ = 2790597942720. Its totient is φ = 200110092288.

The previous prime is 812947274869. The next prime is 812947274903. The reversal of 812947274880 is 88472749218.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16260042 + ... + 16309961.

Almost surely, 2^812947274880 is an apocalyptic number.

812947274880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

812947274880 is an abundant number, since it is smaller than the sum of its proper divisors (1977650667840).

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

812947274880 is a wasteful number, since it uses less digits than its factorization.

812947274880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32570038 (or 32570026 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 60.

The spelling of 812947274880 in words is "eight hundred twelve billion, nine hundred forty-seven million, two hundred seventy-four thousand, eight hundred eighty".