194997876218896 has 135 divisors (see below), whose sum is σ = 408323822079069. Its totient is φ = 90198221815296.

The previous prime is 194997876218869. The next prime is 194997876218909. The reversal of 194997876218896 is 698812678799491.

The square root of 194997876218896 is 13964164.

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., 52871803690000 + 142126072528896 = 7271300^2 + 11921664^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 45634885816 + ... + 45634890088.

Almost surely, 2^{194997876218896} is an apocalyptic number.

194997876218896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

194997876218896 is the 13964164-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194997876218896

194997876218896 is an abundant number, since it is smaller than the sum of its proper divisors (213325945860173).

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

194997876218896 is an frugal number, since it uses more digits than its factorization.

194997876218896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8678 (or 4337 counting only the distinct ones).

The product of its digits is 47405481984, while the sum is 94.

The spelling of 194997876218896 in words is "one hundred ninety-four trillion, nine hundred ninety-seven billion, eight hundred seventy-six million, two hundred eighteen thousand, eight hundred ninety-six".