811864528725 has 12 divisors (see below), whose sum is σ = 1342282687616. Its totient is φ = 432994415280.

The previous prime is 811864528723. The next prime is 811864528729. The reversal of 811864528725 is 527825468118.

It is not a de Polignac number, because 811864528725 - 2¹ = 811864528723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811864528723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5412430117 + ... + 5412430266.

Almost surely, 2^811864528725 is an apocalyptic number.

It is an amenable number.

811864528725 is a deficient number, since it is larger than the sum of its proper divisors (530418158891).

811864528725 is a wasteful number, since it uses less digits than its factorization.

811864528725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10824860396 (or 10824860391 counting only the distinct ones).

The product of its digits is 8601600, while the sum is 57.

The spelling of 811864528725 in words is "eight hundred eleven billion, eight hundred sixty-four million, five hundred twenty-eight thousand, seven hundred twenty-five".