64839495 has 48 divisors (see below), whose sum is σ = 127059840. Its totient is φ = 28074816.

The previous prime is 64839493. The next prime is 64839521. The reversal of 64839495 is 59493846.

It is not a de Polignac number, because 64839495 - 2¹ = 64839493 is a prime.

It is a super-2 number, since 2×64839495² = 8408320223710050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64839493) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11644 + ... + 16286.

It is an arithmetic number, because the mean of its divisors is an integer number (2647080).

Almost surely, 2^64839495 is an apocalyptic number.

64839495 is a deficient number, since it is larger than the sum of its proper divisors (62220345).

64839495 is a wasteful number, since it uses less digits than its factorization.

64839495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684 (or 4677 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The square root of 64839495 is about 8052.2974982299. The cubic root of 64839495 is about 401.7413561132.

The spelling of 64839495 in words is "sixty-four million, eight hundred thirty-nine thousand, four hundred ninety-five".