194477451264 has 144 divisors (see below), whose sum is σ = 573639917760. Its totient is φ = 63446261760.

The previous prime is 194477451253. The next prime is 194477451283. The reversal of 194477451264 is 462154774491.

It is a happy number.

194477451264 is a `hidden beast` number, since 1 + 9 + 4 + 477 + 45 + 126 + 4 = 666.

194477451264 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 194477451264.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 754059 + ... + 978549.

It is an arithmetic number, because the mean of its divisors is an integer number (3983610540).

Almost surely, 2^194477451264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194477451264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286819958880).

194477451264 is an abundant number, since it is smaller than the sum of its proper divisors (379162466496).

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

194477451264 is a wasteful number, since it uses less digits than its factorization.

194477451264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224566 (or 224543 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 54.

The spelling of 194477451264 in words is "one hundred ninety-four billion, four hundred seventy-seven million, four hundred fifty-one thousand, two hundred sixty-four".