64344451 has 4 divisors (see below), whose sum is σ = 64365400. Its totient is φ = 64323504.

The previous prime is 64344433. The next prime is 64344479. The reversal of 64344451 is 15444346.

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

It is a cyclic number.

It is not a de Polignac number, because 64344451 - 2⁷ = 64344323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64344481) 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, 4866 + ... + 12343.

It is an arithmetic number, because the mean of its divisors is an integer number (16091350).

Almost surely, 2^64344451 is an apocalyptic number.

64344451 is a deficient number, since it is larger than the sum of its proper divisors (20949).

64344451 is a wasteful number, since it uses less digits than its factorization.

64344451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20948.

The product of its digits is 23040, while the sum is 31.

The square root of 64344451 is about 8021.4992987596. The cubic root of 64344451 is about 400.7163226888.

Adding to 64344451 its reverse (15444346), we get a palindrome (79788797).

The spelling of 64344451 in words is "sixty-four million, three hundred forty-four thousand, four hundred fifty-one".