811613942025 has 48 divisors (see below), whose sum is σ = 1352417130240. Its totient is φ = 429459451200.

The previous prime is 811613942021. The next prime is 811613942057. The reversal of 811613942025 is 520249316118.

It is not a de Polignac number, because 811613942025 - 2² = 811613942021 is a prime.

It is a super-2 number, since 2×811613942025² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (811613942021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70920954 + ... + 70932396.

It is an arithmetic number, because the mean of its divisors is an integer number (28175356880).

Almost surely, 2^811613942025 is an apocalyptic number.

It is an amenable number.

811613942025 is a deficient number, since it is larger than the sum of its proper divisors (540803188215).

811613942025 is a wasteful number, since it uses less digits than its factorization.

811613942025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18806 (or 18801 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 811613942025 in words is "eight hundred eleven billion, six hundred thirteen million, nine hundred forty-two thousand, twenty-five".