11945999637 has 320 divisors, whose sum is σ = 24354570240. Its totient is φ = 5710694400.

The previous prime is 11945999627. The next prime is 11945999687. The reversal of 11945999637 is 73699954911.

11945999637 is a `hidden beast` number, since 1 + 1 + 9 + 4 + 599 + 9 + 6 + 37 = 666.

It is not a de Polignac number, because 11945999637 - 2⁸ = 11945999381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11945999627) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 115980528 + ... + 115980630.

It is an arithmetic number, because the mean of its divisors is an integer number (76108032).

Almost surely, 2^11945999637 is an apocalyptic number.

11945999637 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11945999637 is an abundant number, since it is smaller than the sum of its proper divisors (12408570603).

11945999637 is a wasteful number, since it uses less digits than its factorization.

11945999637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 197 counting only the distinct ones).

The product of its digits is 16533720, while the sum is 63.

The spelling of 11945999637 in words is "eleven billion, nine hundred forty-five million, nine hundred ninety-nine thousand, six hundred thirty-seven".