6464559651 has 16 divisors (see below), whose sum is σ = 9522024960. Its totient is φ = 3868319520.

The previous prime is 6464559649. The next prime is 6464559691. The reversal of 6464559651 is 1569554646.

It is not a de Polignac number, because 6464559651 - 2¹ = 6464559649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6464559594 and 6464559603.

It is not an unprimeable number, because it can be changed into a prime (6464559691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1237240 + ... + 1242453.

It is an arithmetic number, because the mean of its divisors is an integer number (595126560).

Almost surely, 2^6464559651 is an apocalyptic number.

6464559651 is a deficient number, since it is larger than the sum of its proper divisors (3057465309).

6464559651 is a wasteful number, since it uses less digits than its factorization.

6464559651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479786.

The product of its digits is 3888000, while the sum is 51.

The square root of 6464559651 is about 80402.4853533770. The cubic root of 6464559651 is about 1862.8575618842.

The spelling of 6464559651 in words is "six billion, four hundred sixty-four million, five hundred fifty-nine thousand, six hundred fifty-one".