11457817013 has 4 divisors (see below), whose sum is σ = 11586556620. Its totient is φ = 11329077408.

The previous prime is 11457817001. The next prime is 11457817039. The reversal of 11457817013 is 31071875411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31071875411 = 12409 ⋅2503979.

It can be written as a sum of positive squares in 2 ways, for example, as 1033815409 + 10424001604 = 32153^2 + 102098^2 .

It is a cyclic number.

It is not a de Polignac number, because 11457817013 - 2²⁰ = 11456768437 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 (14457817013) 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, 64369670 + ... + 64369847.

It is an arithmetic number, because the mean of its divisors is an integer number (2896639155).

Almost surely, 2^11457817013 is an apocalyptic number.

It is an amenable number.

11457817013 is a deficient number, since it is larger than the sum of its proper divisors (128739607).

11457817013 is an equidigital number, since it uses as much as digits as its factorization.

11457817013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128739606.

The product of its (nonzero) digits is 23520, while the sum is 38.

The spelling of 11457817013 in words is "eleven billion, four hundred fifty-seven million, eight hundred seventeen thousand, thirteen".