64750491 has 18 divisors (see below), whose sum is σ = 101278788. Its totient is φ = 39845520.

The previous prime is 64750487. The next prime is 64750513. The reversal of 64750491 is 19405746.

64750491 is a `hidden beast` number, since 64 + 7 + 504 + 91 = 666.

It is not a de Polignac number, because 64750491 - 2² = 64750487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64750391) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19765 + ... + 22806.

Almost surely, 2^64750491 is an apocalyptic number.

64750491 is a deficient number, since it is larger than the sum of its proper divisors (36528297).

64750491 is a wasteful number, since it uses less digits than its factorization.

64750491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42603 (or 42587 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 64750491 is about 8046.7689789132. The cubic root of 64750491 is about 401.5574509128.

The spelling of 64750491 in words is "sixty-four million, seven hundred fifty thousand, four hundred ninety-one".