64161903204 has 243 divisors, whose sum is σ = 195100347897. Its totient is φ = 17727087168.

The previous prime is 64161903181. The next prime is 64161903233. The reversal of 64161903204 is 40230916146.

The square root of 64161903204 is 253302.

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

64161903204 is a `hidden beast` number, since 6 + 4 + 1 + 619 + 0 + 32 + 0 + 4 = 666.

64161903204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 57412952100 + 6748951104 = 239610^2 + 82152^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 393631227 + ... + 393631389.

Almost surely, 2^64161903204 is an apocalyptic number.

64161903204 is the 253302-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64161903204

64161903204 is an abundant number, since it is smaller than the sum of its proper divisors (130938444693).

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

64161903204 is a wasteful number, since it uses less digits than its factorization.

64161903204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

Multiplying 64161903204 by its sum of digits (36), we get a square (2309828515344 = 1519812²).

64161903204 divided by its sum of digits (36) gives a square (1782275089 = 42217²).

The spelling of 64161903204 in words is "sixty-four billion, one hundred sixty-one million, nine hundred three thousand, two hundred four".