643115600604 has 72 divisors (see below), whose sum is σ = 1649920774320. Its totient is φ = 211178886912.

The previous prime is 643115600593. The next prime is 643115600653. The reversal of 643115600604 is 406006511346.

It is a happy number.

643115600604 is a `hidden beast` number, since 6 + 4 + 31 + 1 + 560 + 0 + 60 + 4 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2025402 + ... + 2321310.

It is an arithmetic number, because the mean of its divisors is an integer number (22915566310).

Almost surely, 2^643115600604 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 643115600604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824960387160).

643115600604 is an abundant number, since it is smaller than the sum of its proper divisors (1006805173716).

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

643115600604 is a wasteful number, since it uses less digits than its factorization.

643115600604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296819 (or 296814 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 643115600604 in words is "six hundred forty-three billion, one hundred fifteen million, six hundred thousand, six hundred four".