815370112881 has 12 divisors (see below), whose sum is σ = 1218369134580. Its totient is φ = 524835934560.

The previous prime is 815370112877. The next prime is 815370112891. The reversal of 815370112881 is 188211073518.

815370112881 is a `hidden beast` number, since 8 + 1 + 537 + 0 + 11 + 28 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 683226230625 + 132143882256 = 826575^2 + 363516^2 .

It is not a de Polignac number, because 815370112881 - 2² = 815370112877 is a prime.

It is a super-2 number, since 2×815370112881² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (815370112801) 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, 1562011450 + ... + 1562011971.

It is an arithmetic number, because the mean of its divisors is an integer number (101530761215).

Almost surely, 2^815370112881 is an apocalyptic number.

It is an amenable number.

815370112881 is a deficient number, since it is larger than the sum of its proper divisors (402999021699).

815370112881 is a wasteful number, since it uses less digits than its factorization.

815370112881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124023456 (or 3124023453 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 45.

The spelling of 815370112881 in words is "eight hundred fifteen billion, three hundred seventy million, one hundred twelve thousand, eight hundred eighty-one".