6400312536 has 64 divisors (see below), whose sum is σ = 16201641600. Its totient is φ = 2106720000.

The previous prime is 6400312493. The next prime is 6400312547. The reversal of 6400312536 is 6352130046.

It is a congruent number.

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, 2243511 + ... + 2246361.

It is an arithmetic number, because the mean of its divisors is an integer number (253150650).

Almost surely, 2^6400312536 is an apocalyptic number.

It is an amenable number.

6400312536 is an abundant number, since it is smaller than the sum of its proper divisors (9801329064).

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

6400312536 is a wasteful number, since it uses less digits than its factorization.

6400312536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000 (or 3996 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 6400312536 is about 80001.9533261532. The cubic root of 6400312536 is about 1856.6657551117.

The spelling of 6400312536 in words is "six billion, four hundred million, three hundred twelve thousand, five hundred thirty-six".