11451640652531 has 4 divisors (see below), whose sum is σ = 11452575263712. Its totient is φ = 11450706041352.

The previous prime is 11451640652489. The next prime is 11451640652591. The reversal of 11451640652531 is 13525604615411.

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

It is a cyclic number.

It is not a de Polignac number, because 11451640652531 - 2¹⁸ = 11451640390387 is a prime.

It is a super-2 number, since 2×11451640652531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11451640652591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467287211 + ... + 467311716.

It is an arithmetic number, because the mean of its divisors is an integer number (2863143815928).

Almost surely, 2^{11451640652531} is an apocalyptic number.

11451640652531 is a deficient number, since it is larger than the sum of its proper divisors (934611181).

11451640652531 is an equidigital number, since it uses as much as digits as its factorization.

11451640652531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934611180.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 11451640652531 in words is "eleven trillion, four hundred fifty-one billion, six hundred forty million, six hundred fifty-two thousand, five hundred thirty-one".