188457378979 has 2 divisors, whose sum is σ = 188457378980. Its totient is φ = 188457378978.

The previous prime is 188457378937. The next prime is 188457378983. The reversal of 188457378979 is 979873754881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 188457378979 - 2²⁹ = 187920508067 is a prime.

It is not a weakly prime, because it can be changed into another prime (188457378079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94228689489 + 94228689490.

It is an arithmetic number, because the mean of its divisors is an integer number (94228689490).

Almost surely, 2^188457378979 is an apocalyptic number.

188457378979 is a deficient number, since it is larger than the sum of its proper divisors (1).

188457378979 is an equidigital number, since it uses as much as digits as its factorization.

188457378979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 853493760, while the sum is 76.

The spelling of 188457378979 in words is "one hundred eighty-eight billion, four hundred fifty-seven million, three hundred seventy-eight thousand, nine hundred seventy-nine".