11615631457 has 4 divisors (see below), whose sum is σ = 11746144260. Its totient is φ = 11485118656.

The previous prime is 11615631389. The next prime is 11615631473. The reversal of 11615631457 is 75413651611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 749445376 + 10866186081 = 27376^2 + 104241^2 .

It is a cyclic number.

It is not a de Polignac number, because 11615631457 - 2⁷ = 11615631329 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11615631857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65256268 + ... + 65256445.

It is an arithmetic number, because the mean of its divisors is an integer number (2936536065).

Almost surely, 2^11615631457 is an apocalyptic number.

It is an amenable number.

11615631457 is a deficient number, since it is larger than the sum of its proper divisors (130512803).

11615631457 is an equidigital number, since it uses as much as digits as its factorization.

11615631457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130512802.

The product of its digits is 75600, while the sum is 40.

The spelling of 11615631457 in words is "eleven billion, six hundred fifteen million, six hundred thirty-one thousand, four hundred fifty-seven".