6340472657 has 8 divisors (see below), whose sum is σ = 6430755240. Its totient is φ = 6250729600.

The previous prime is 6340472639. The next prime is 6340472659. The reversal of 6340472657 is 7562740436.

It can be written as a sum of positive squares in 4 ways, for example, as 582546496 + 5757926161 = 24136^2 + 75881^2 .

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 6340472657 - 2⁸ = 6340472401 is a prime.

It is a super-3 number, since 3×6340472657³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6340472659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111182 + ... + 158247.

It is an arithmetic number, because the mean of its divisors is an integer number (803844405).

Almost surely, 2^6340472657 is an apocalyptic number.

It is an amenable number.

6340472657 is a deficient number, since it is larger than the sum of its proper divisors (90282583).

6340472657 is a wasteful number, since it uses less digits than its factorization.

6340472657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269763.

The product of its (nonzero) digits is 846720, while the sum is 44.

The square root of 6340472657 is about 79627.0849460157. The cubic root of 6340472657 is about 1850.8613137600.

The spelling of 6340472657 in words is "six billion, three hundred forty million, four hundred seventy-two thousand, six hundred fifty-seven".