11957388187 has 2 divisors, whose sum is σ = 11957388188. Its totient is φ = 11957388186.

The previous prime is 11957388139. The next prime is 11957388197. The reversal of 11957388187 is 78188375911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11957388187 - 2²⁷ = 11823170459 is a prime.

It is not a weakly prime, because it can be changed into another prime (11957388197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5978694093 + 5978694094.

It is an arithmetic number, because the mean of its divisors is an integer number (5978694094).

Almost surely, 2^11957388187 is an apocalyptic number.

11957388187 is a deficient number, since it is larger than the sum of its proper divisors (1).

11957388187 is an equidigital number, since it uses as much as digits as its factorization.

11957388187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 58.

The spelling of 11957388187 in words is "eleven billion, nine hundred fifty-seven million, three hundred eighty-eight thousand, one hundred eighty-seven".