6464633501 has 4 divisors (see below), whose sum is σ = 6586607772. Its totient is φ = 6342659232.

The previous prime is 6464633449. The next prime is 6464633507. The reversal of 6464633501 is 1053364646.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2978321476 + 3486312025 = 54574^2 + 59045^2 .

It is a cyclic number.

It is not a de Polignac number, because 6464633501 - 2¹⁸ = 6464371357 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 (6464633507) 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, 60987056 + ... + 60987161.

It is an arithmetic number, because the mean of its divisors is an integer number (1646651943).

Almost surely, 2^6464633501 is an apocalyptic number.

It is an amenable number.

6464633501 is a deficient number, since it is larger than the sum of its proper divisors (121974271).

6464633501 is a wasteful number, since it uses less digits than its factorization.

6464633501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121974270.

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 6464633501 is about 80402.9446040380. The cubic root of 6464633501 is about 1862.8646555103.

The spelling of 6464633501 in words is "six billion, four hundred sixty-four million, six hundred thirty-three thousand, five hundred one".