11865962889 has 168 divisors, whose sum is σ = 21320399016. Its totient is φ = 6569164800.

The previous prime is 11865962887. The next prime is 11865962891. The reversal of 11865962889 is 98826956811.

11865962889 is a `hidden beast` number, since 1 + 18 + 6 + 596 + 28 + 8 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (11865962887) and next prime (11865962891).

It can be written as a sum of positive squares in 4 ways, for example, as 178623225 + 11687339664 = 13365^2 + 108108^2 .

It is not a de Polignac number, because 11865962889 - 2¹ = 11865962887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11865962887) by changing a digit.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 61481577 + ... + 61481769.

It is an arithmetic number, because the mean of its divisors is an integer number (126907137).

Almost surely, 2^11865962889 is an apocalyptic number.

It is an amenable number.

11865962889 is a deficient number, since it is larger than the sum of its proper divisors (9454436127).

11865962889 is a wasteful number, since it uses less digits than its factorization.

11865962889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 265 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 63.

The spelling of 11865962889 in words is "eleven billion, eight hundred sixty-five million, nine hundred sixty-two thousand, eight hundred eighty-nine".