6502643399 has 4 divisors (see below), whose sum is σ = 7431592464. Its totient is φ = 5573694336.

The previous prime is 6502643387. The next prime is 6502643431. The reversal of 6502643399 is 9933462056.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-6502643399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6502640399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464474522 + ... + 464474535.

It is an arithmetic number, because the mean of its divisors is an integer number (1857898116).

Almost surely, 2^6502643399 is an apocalyptic number.

6502643399 is a deficient number, since it is larger than the sum of its proper divisors (928949065).

6502643399 is an equidigital number, since it uses as much as digits as its factorization.

6502643399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928949064.

The product of its (nonzero) digits is 1049760, while the sum is 47.

The square root of 6502643399 is about 80638.9694812626. The cubic root of 6502643399 is about 1866.5085317180.

The spelling of 6502643399 in words is "six billion, five hundred two million, six hundred forty-three thousand, three hundred ninety-nine".