188457378961 has 24 divisors (see below), whose sum is σ = 206579419200. Its totient is φ = 171692892000.

The previous prime is 188457378937. The next prime is 188457378979. The reversal of 188457378961 is 169873754881.

It is not a de Polignac number, because 188457378961 - 2³⁷ = 51018425489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188457375961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2591860 + ... + 2663578.

It is an arithmetic number, because the mean of its divisors is an integer number (8607475800).

Almost surely, 2^188457378961 is an apocalyptic number.

It is an amenable number.

188457378961 is a deficient number, since it is larger than the sum of its proper divisors (18122040239).

188457378961 is a wasteful number, since it uses less digits than its factorization.

188457378961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72037 (or 72018 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 67.

The spelling of 188457378961 in words is "one hundred eighty-eight billion, four hundred fifty-seven million, three hundred seventy-eight thousand, nine hundred sixty-one".