64503263 has 16 divisors (see below), whose sum is σ = 71808000. Its totient is φ = 57451680.

The previous prime is 64503251. The next prime is 64503277. The reversal of 64503263 is 36230546.

It is not a de Polignac number, because 64503263 - 2¹⁰ = 64502239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64503563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172745 + ... + 173117.

It is an arithmetic number, because the mean of its divisors is an integer number (4488000).

Almost surely, 2^64503263 is an apocalyptic number.

64503263 is a deficient number, since it is larger than the sum of its proper divisors (7304737).

64503263 is a wasteful number, since it uses less digits than its factorization.

64503263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 64503263 is about 8031.3923450420. The cubic root of 64503263 is about 401.0457283316.

The spelling of 64503263 in words is "sixty-four million, five hundred three thousand, two hundred sixty-three".