811925642 has 16 divisors (see below), whose sum is σ = 1329070464. Its totient is φ = 368928000.

The previous prime is 811925633. The next prime is 811925693. The reversal of 811925642 is 246529118.

It is a super-2 number, since 2×811925642² = 1318446496274224328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 811925596 and 811925605.

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, 89642 + ... + 98282.

It is an arithmetic number, because the mean of its divisors is an integer number (83066904).

Almost surely, 2^811925642 is an apocalyptic number.

811925642 is a deficient number, since it is larger than the sum of its proper divisors (517144822).

811925642 is a wasteful number, since it uses less digits than its factorization.

811925642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12925.

The product of its digits is 34560, while the sum is 38.

The square root of 811925642 is about 28494.3089405586. The cubic root of 811925642 is about 932.9078606922.

The spelling of 811925642 in words is "eight hundred eleven million, nine hundred twenty-five thousand, six hundred forty-two".