64278963 has 12 divisors (see below), whose sum is σ = 106111408. Its totient is φ = 36730800.

The previous prime is 64278947. The next prime is 64278967. The reversal of 64278963 is 36987246.

It is not a de Polignac number, because 64278963 - 2⁴ = 64278947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64278967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 510088 + ... + 510213.

Almost surely, 2^64278963 is an apocalyptic number.

64278963 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

64278963 is a deficient number, since it is larger than the sum of its proper divisors (41832445).

64278963 is a wasteful number, since it uses less digits than its factorization.

64278963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020314 (or 1020311 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 64278963 is about 8017.4162296840. The cubic root of 64278963 is about 400.5803305506.

The spelling of 64278963 in words is "sixty-four million, two hundred seventy-eight thousand, nine hundred sixty-three".