64463951 has 2 divisors, whose sum is σ = 64463952. Its totient is φ = 64463950.

The previous prime is 64463947. The next prime is 64463981. The reversal of 64463951 is 15936446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64463951 - 2² = 64463947 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64463981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32231975 + 32231976.

It is an arithmetic number, because the mean of its divisors is an integer number (32231976).

Almost surely, 2^64463951 is an apocalyptic number.

64463951 is a deficient number, since it is larger than the sum of its proper divisors (1).

64463951 is an equidigital number, since it uses as much as digits as its factorization.

64463951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The square root of 64463951 is about 8028.9445757210. The cubic root of 64463951 is about 400.9642383267.

The spelling of 64463951 in words is "sixty-four million, four hundred sixty-three thousand, nine hundred fifty-one".