6404512730 has 32 divisors (see below), whose sum is σ = 14372726400. Its totient is φ = 1996211520.

The previous prime is 6404512657. The next prime is 6404512813. The reversal of 6404512730 is 372154046.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4158005 + ... + 4159544.

It is an arithmetic number, because the mean of its divisors is an integer number (449147700).

Almost surely, 2^6404512730 is an apocalyptic number.

6404512730 is an abundant number, since it is smaller than the sum of its proper divisors (7968213670).

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

6404512730 is a wasteful number, since it uses less digits than its factorization.

6404512730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8317574.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 6404512730 is about 80028.1995923937. The cubic root of 6404512730 is about 1857.0718108606.

Adding to 6404512730 its reverse (372154046), we get a palindrome (6776666776).

The spelling of 6404512730 in words is "six billion, four hundred four million, five hundred twelve thousand, seven hundred thirty".