11615607440 has 40 divisors (see below), whose sum is σ = 28427674560. Its totient is φ = 4401703296.

The previous prime is 11615607439. The next prime is 11615607463. The reversal of 11615607440 is 4470651611.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 11615607440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3819404 + ... + 3822443.

It is an arithmetic number, because the mean of its divisors is an integer number (710691864).

Almost surely, 2^11615607440 is an apocalyptic number.

11615607440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11615607440 is an abundant number, since it is smaller than the sum of its proper divisors (16812067120).

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

11615607440 is a wasteful number, since it uses less digits than its factorization.

11615607440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7641879 (or 7641873 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 11615607440 in words is "eleven billion, six hundred fifteen million, six hundred seven thousand, four hundred forty".