11807858997 has 160 divisors (see below), whose sum is σ = 21734697600. Its totient is φ = 6295449600.

The previous prime is 11807858971. The next prime is 11807859017. The reversal of 11807858997 is 79985870811.

It is a de Polignac number, because none of the positive numbers 2^k-11807858997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11807858917) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 25613347 + ... + 25613807.

It is an arithmetic number, because the mean of its divisors is an integer number (135841860).

Almost surely, 2^11807858997 is an apocalyptic number.

11807858997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11807858997 is a deficient number, since it is larger than the sum of its proper divisors (9926838603).

11807858997 is a wasteful number, since it uses less digits than its factorization.

11807858997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 63.

The spelling of 11807858997 in words is "eleven billion, eight hundred seven million, eight hundred fifty-eight thousand, nine hundred ninety-seven".