812235720290 has 64 divisors (see below), whose sum is σ = 1502373242880. Its totient is φ = 316017858240.

The previous prime is 812235720253. The next prime is 812235720301. The reversal of 812235720290 is 92027532218.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73281089 + ... + 73292171.

It is an arithmetic number, because the mean of its divisors is an integer number (23474581920).

Almost surely, 2^812235720290 is an apocalyptic number.

812235720290 is a deficient number, since it is larger than the sum of its proper divisors (690137522590).

812235720290 is a wasteful number, since it uses less digits than its factorization.

812235720290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12087.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 812235720290 in words is "eight hundred twelve billion, two hundred thirty-five million, seven hundred twenty thousand, two hundred ninety".