188040189816 has 24 divisors (see below), whose sum is σ = 509275514280. Its totient is φ = 62680063248.

The previous prime is 188040189781. The next prime is 188040189851. The reversal of 188040189816 is 618981040881.

It is a happy number.

188040189816 is a `hidden beast` number, since 1 + 8 + 80 + 401 + 89 + 81 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (188040189781) and next prime (188040189851).

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×188040189816² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1305834580 + ... + 1305834723.

It is an arithmetic number, because the mean of its divisors is an integer number (21219813095).

Almost surely, 2^188040189816 is an apocalyptic number.

It is an amenable number.

188040189816 is an abundant number, since it is smaller than the sum of its proper divisors (321235324464).

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

188040189816 is a wasteful number, since it uses less digits than its factorization.

188040189816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611669315 (or 2611669308 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 54.

The spelling of 188040189816 in words is "one hundred eighty-eight billion, forty million, one hundred eighty-nine thousand, eight hundred sixteen".