11995418657 has 2 divisors, whose sum is σ = 11995418658. Its totient is φ = 11995418656.

The previous prime is 11995418653. The next prime is 11995418681. The reversal of 11995418657 is 75681459911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8921935936 + 3073482721 = 94456^2 + 55439^2 .

It is a cyclic number.

It is not a de Polignac number, because 11995418657 - 2² = 11995418653 is a prime.

It is a super-4 number, since 4×11995418657⁴ (a number of 41 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (11995418653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5997709328 + 5997709329.

It is an arithmetic number, because the mean of its divisors is an integer number (5997709329).

Almost surely, 2^11995418657 is an apocalyptic number.

It is an amenable number.

11995418657 is a deficient number, since it is larger than the sum of its proper divisors (1).

11995418657 is an equidigital number, since it uses as much as digits as its factorization.

11995418657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 56.

The spelling of 11995418657 in words is "eleven billion, nine hundred ninety-five million, four hundred eighteen thousand, six hundred fifty-seven".