6427640465 has 8 divisors (see below), whose sum is σ = 7714052160. Its totient is φ = 5141523312.

The previous prime is 6427640447. The next prime is 6427640491. The reversal of 6427640465 is 5640467246.

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 6427640465 - 2⁸ = 6427640209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22379 + ... + 115568.

It is an arithmetic number, because the mean of its divisors is an integer number (964256520).

Almost surely, 2^6427640465 is an apocalyptic number.

It is an amenable number.

6427640465 is a deficient number, since it is larger than the sum of its proper divisors (1286411695).

6427640465 is a wasteful number, since it uses less digits than its factorization.

6427640465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147271.

The product of its (nonzero) digits is 967680, while the sum is 44.

The square root of 6427640465 is about 80172.5667856531. The cubic root of 6427640465 is about 1859.3045213650.

The spelling of 6427640465 in words is "six billion, four hundred twenty-seven million, six hundred forty thousand, four hundred sixty-five".