188667605406 has 48 divisors (see below), whose sum is σ = 440439252624. Its totient is φ = 53721029376.

The previous prime is 188667605387. The next prime is 188667605419. The reversal of 188667605406 is 604506766881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1008955 + ... + 1181238.

It is an arithmetic number, because the mean of its divisors is an integer number (9175817763).

Almost surely, 2^188667605406 is an apocalyptic number.

188667605406 is an abundant number, since it is smaller than the sum of its proper divisors (251771647218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

188667605406 is a wasteful number, since it uses less digits than its factorization.

188667605406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190505 (or 2190498 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 188667605406 in words is "one hundred eighty-eight billion, six hundred sixty-seven million, six hundred five thousand, four hundred six".