11954689992 has 64 divisors (see below), whose sum is σ = 37951401600. Its totient is φ = 3415625280.

The previous prime is 11954689949. The next prime is 11954689993. The reversal of 11954689992 is 29998645911.

11954689992 is a `hidden beast` number, since 1 + 1 + 9 + 546 + 89 + 9 + 9 + 2 = 666.

It is a super-2 number, since 2×11954689992² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (11954689993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3951759 + ... + 3954782.

It is an arithmetic number, because the mean of its divisors is an integer number (592990650).

Almost surely, 2^11954689992 is an apocalyptic number.

11954689992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11954689992 is an abundant number, since it is smaller than the sum of its proper divisors (25996711608).

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

11954689992 is a wasteful number, since it uses less digits than its factorization.

11954689992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7906563 (or 7906553 counting only the distinct ones).

The product of its digits is 12597120, while the sum is 63.

It can be divided in two parts, 119 and 54689992, that added together give a triangular number (54690111 = T₁₀₄₅₈).

The spelling of 11954689992 in words is "eleven billion, nine hundred fifty-four million, six hundred eighty-nine thousand, nine hundred ninety-two".