6390756457 has 8 divisors (see below), whose sum is σ = 6819265760. Its totient is φ = 5971462560.

The previous prime is 6390756451. The next prime is 6390756461. The reversal of 6390756457 is 7546570936.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6390756457 - 2⁷ = 6390756329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6390756451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2302419 + ... + 2305192.

It is an arithmetic number, because the mean of its divisors is an integer number (852408220).

Almost surely, 2^6390756457 is an apocalyptic number.

It is an amenable number.

6390756457 is a deficient number, since it is larger than the sum of its proper divisors (428509303).

6390756457 is a wasteful number, since it uses less digits than its factorization.

6390756457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4607703.

The product of its (nonzero) digits is 4762800, while the sum is 52.

The square root of 6390756457 is about 79942.2069810435. The cubic root of 6390756457 is about 1855.7412543122.

The spelling of 6390756457 in words is "six billion, three hundred ninety million, seven hundred fifty-six thousand, four hundred fifty-seven".