64644051 has 8 divisors (see below), whose sum is σ = 86365440. Its totient is φ = 43009352.

The previous prime is 64644049. The next prime is 64644059. The reversal of 64644051 is 15044646.

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 64644051 - 2¹ = 64644049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64644059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19911 + ... + 22928.

It is an arithmetic number, because the mean of its divisors is an integer number (10795680).

Almost surely, 2^64644051 is an apocalyptic number.

64644051 is a deficient number, since it is larger than the sum of its proper divisors (21721389).

64644051 is a wasteful number, since it uses less digits than its factorization.

64644051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43345.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 64644051 is about 8040.1524239283. The cubic root of 64644051 is about 401.3372970259.

Adding to 64644051 its reverse (15044646), we get a palindrome (79688697).

The spelling of 64644051 in words is "sixty-four million, six hundred forty-four thousand, fifty-one".