6404894325 has 72 divisors (see below), whose sum is σ = 11919627720. Its totient is φ = 3283660800.

The previous prime is 6404894323. The next prime is 6404894351. The reversal of 6404894325 is 5234984046.

It can be written as a sum of positive squares in 12 ways, for example, as 2138322564 + 4266571761 = 46242^2 + 65319^2 .

It is not a de Polignac number, because 6404894325 - 2¹ = 6404894323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404894323) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1570489 + ... + 1574561.

It is an arithmetic number, because the mean of its divisors is an integer number (165550385).

Almost surely, 2^6404894325 is an apocalyptic number.

It is an amenable number.

6404894325 is a deficient number, since it is larger than the sum of its proper divisors (5514733395).

6404894325 is a wasteful number, since it uses less digits than its factorization.

6404894325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4359 (or 4351 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The square root of 6404894325 is about 80030.5836852387. The cubic root of 6404894325 is about 1857.1086929401.

The spelling of 6404894325 in words is "six billion, four hundred four million, eight hundred ninety-four thousand, three hundred twenty-five".