11865657590 has 16 divisors (see below), whose sum is σ = 21615512688. Its totient is φ = 4689078816.

The previous prime is 11865657581. The next prime is 11865657623. The reversal of 11865657590 is 9575656811.

It is a congruent number.

It is an unprimeable number.

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, 7147157 + ... + 7148816.

It is an arithmetic number, because the mean of its divisors is an integer number (1350969543).

Almost surely, 2^11865657590 is an apocalyptic number.

11865657590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11865657590 is a deficient number, since it is larger than the sum of its proper divisors (9749855098).

11865657590 is a wasteful number, since it uses less digits than its factorization.

11865657590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14296063.

The product of its (nonzero) digits is 2268000, while the sum is 53.

The spelling of 11865657590 in words is "eleven billion, eight hundred sixty-five million, six hundred fifty-seven thousand, five hundred ninety".