194355776164 has 81 divisors (see below), whose sum is σ = 387750963873. Its totient is φ = 85173765600.

The previous prime is 194355776159. The next prime is 194355776179. The reversal of 194355776164 is 461677553491.

The square root of 194355776164 is 440858.

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., 101915454564 + 92440321600 = 319242^2 + 304040^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194355776099 and 194355776108.

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, 281267059 + ... + 281267749.

Almost surely, 2^194355776164 is an apocalyptic number.

194355776164 is the 440858-th square number.

It is an amenable number.

194355776164 is a deficient number, since it is larger than the sum of its proper divisors (193395187709).

194355776164 is an equidigital number, since it uses as much as digits as its factorization.

194355776164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466 (or 733 counting only the distinct ones).

The product of its digits is 19051200, while the sum is 58.

The spelling of 194355776164 in words is "one hundred ninety-four billion, three hundred fifty-five million, seven hundred seventy-six thousand, one hundred sixty-four".