195554990656 has 63 divisors (see below), whose sum is σ = 391575023427. Its totient is φ = 96898369920.

The previous prime is 195554990633. The next prime is 195554990671. The reversal of 195554990656 is 656099455591.

The square root of 195554990656 is 442216.

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

195554990656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 590800411 + ... + 590800741.

Almost surely, 2^195554990656 is an apocalyptic number.

195554990656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

195554990656 is the 442216-th square number.

It is an amenable number.

195554990656 is an abundant number, since it is smaller than the sum of its proper divisors (196020032771).

195554990656 is an frugal number, since it uses more digits than its factorization.

195554990656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 65610000, while the sum is 64.

Multiplying 195554990656 by its sum of digits (64), we get a square (12515519401984 = 3537728²).

195554990656 divided by its sum of digits (64) gives a square (3055546729 = 55277²).

The spelling of 195554990656 in words is "one hundred ninety-five billion, five hundred fifty-four million, nine hundred ninety thousand, six hundred fifty-six".