11465661437213 has 4 divisors (see below), whose sum is σ = 11583864132540. Its totient is φ = 11347458741888.

The previous prime is 11465661437189. The next prime is 11465661437221. The reversal of 11465661437213 is 31273416656411.

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 6001039888804 + 5464621548409 = 2449702^2 + 2337653^2 .

It is a cyclic number.

It is not a de Polignac number, because 11465661437213 - 2¹² = 11465661433117 is a prime.

It is a super-2 number, since 2×11465661437213² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11465661437233) 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, 59101347518 + ... + 59101347711.

It is an arithmetic number, because the mean of its divisors is an integer number (2895966033135).

Almost surely, 2^{11465661437213} is an apocalyptic number.

It is an amenable number.

11465661437213 is a deficient number, since it is larger than the sum of its proper divisors (118202695327).

11465661437213 is an equidigital number, since it uses as much as digits as its factorization.

11465661437213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118202695326.

The product of its digits is 2177280, while the sum is 50.

The spelling of 11465661437213 in words is "eleven trillion, four hundred sixty-five billion, six hundred sixty-one million, four hundred thirty-seven thousand, two hundred thirteen".