11640924651 has 4 divisors (see below), whose sum is σ = 15521232872. Its totient is φ = 7760616432.

The previous prime is 11640924637. The next prime is 11640924653. The reversal of 11640924651 is 15642904611.

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

It is not a de Polignac number, because 11640924651 - 2⁵ = 11640924619 is a prime.

It is a super-2 number, since 2×11640924651² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11640924653) 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, 1940154106 + ... + 1940154111.

It is an arithmetic number, because the mean of its divisors is an integer number (3880308218).

Almost surely, 2^11640924651 is an apocalyptic number.

11640924651 is a deficient number, since it is larger than the sum of its proper divisors (3880308221).

11640924651 is an equidigital number, since it uses as much as digits as its factorization.

11640924651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880308220.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 11640924651 in words is "eleven billion, six hundred forty million, nine hundred twenty-four thousand, six hundred fifty-one".