812763668 has 24 divisors (see below), whose sum is σ = 1457374464. Its totient is φ = 396428000.

The previous prime is 812763649. The next prime is 812763701. The reversal of 812763668 is 866367218.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51518 + ... + 65418.

It is an arithmetic number, because the mean of its divisors is an integer number (60723936).

Almost surely, 2^812763668 is an apocalyptic number.

It is an amenable number.

812763668 is a deficient number, since it is larger than the sum of its proper divisors (644610796).

812763668 is a wasteful number, since it uses less digits than its factorization.

812763668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14263 (or 14261 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 812763668 is about 28509.0102949927. The cubic root of 812763668 is about 933.2287161084.

The spelling of 812763668 in words is "eight hundred twelve million, seven hundred sixty-three thousand, six hundred sixty-eight".