188696409664 has 63 divisors (see below), whose sum is σ = 435634383873. Its totient is φ = 80859464448.

The previous prime is 188696409619. The next prime is 188696409683. The reversal of 188696409664 is 466904696881.

The square root of 188696409664 is 434392.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 155204481600 + 33491928064 = 393960^2 + 183008^2 .

It is a super-2 number, since 2×188696409664² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 188696409664.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24322074 + ... + 24329830.

Almost surely, 2^188696409664 is an apocalyptic number.

188696409664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

188696409664 is the 434392-nd square number.

It is an amenable number.

188696409664 is an abundant number, since it is smaller than the sum of its proper divisors (246937974209).

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

188696409664 is an frugal number, since it uses more digits than its factorization.

188696409664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15540 (or 7766 counting only the distinct ones).

The product of its (nonzero) digits is 107495424, while the sum is 67.

The spelling of 188696409664 in words is "one hundred eighty-eight billion, six hundred ninety-six million, four hundred nine thousand, six hundred sixty-four".