6402640575 has 48 divisors (see below), whose sum is σ = 10662512000. Its totient is φ = 3390076800.

The previous prime is 6402640523. The next prime is 6402640579. The reversal of 6402640575 is 5750462046.

It is not a de Polignac number, because 6402640575 - 2⁶ = 6402640511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402640579) 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 47 ways as a sum of consecutive naturals, for example, 8663556 + ... + 8664294.

Almost surely, 2^6402640575 is an apocalyptic number.

6402640575 is a deficient number, since it is larger than the sum of its proper divisors (4259871425).

6402640575 is a wasteful number, since it uses less digits than its factorization.

6402640575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432 (or 1427 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 39.

The square root of 6402640575 is about 80016.5018917973. The cubic root of 6402640575 is about 1856.8908413241.

The spelling of 6402640575 in words is "six billion, four hundred two million, six hundred forty thousand, five hundred seventy-five".