11651508816 has 40 divisors (see below), whose sum is σ = 30255712320. Its totient is φ = 3863709696.

The previous prime is 11651508811. The next prime is 11651508829. The reversal of 11651508816 is 61880515611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11651508811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619596 + ... + 638123.

It is an arithmetic number, because the mean of its divisors is an integer number (756392808).

Almost surely, 2^11651508816 is an apocalyptic number.

11651508816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11651508816 is an abundant number, since it is smaller than the sum of its proper divisors (18604203504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11651508816 is a wasteful number, since it uses less digits than its factorization.

11651508816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257923 (or 1257917 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 42.

The spelling of 11651508816 in words is "eleven billion, six hundred fifty-one million, five hundred eight thousand, eight hundred sixteen".