7816508905361 has 8 divisors (see below), whose sum is σ = 8533090860840. Its totient is φ = 7116400098432.

The previous prime is 7816508905327. The next prime is 7816508905397. The reversal of 7816508905361 is 1635098056187.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1434140373136 + 6382368532225 = 1197556^2 + 2526335^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7816508905361 - 2²⁶ = 7816441796497 is a prime.

It is a super-2 number, since 2×7816508905361² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7816508905361.

It is not an unprimeable number, because it can be changed into a prime (7816508905561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4118286146 + ... + 4118288043.

It is an arithmetic number, because the mean of its divisors is an integer number (1066636357605).

Almost surely, 2^{7816508905361} is an apocalyptic number.

It is an amenable number.

7816508905361 is a deficient number, since it is larger than the sum of its proper divisors (716581955479).

7816508905361 is a wasteful number, since it uses less digits than its factorization.

7816508905361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8236574275.

The product of its (nonzero) digits is 10886400, while the sum is 59.

The spelling of 7816508905361 in words is "seven trillion, eight hundred sixteen billion, five hundred eight million, nine hundred five thousand, three hundred sixty-one".