64135539 has 24 divisors (see below), whose sum is σ = 100088352. Its totient is φ = 39340800.

The previous prime is 64135531. The next prime is 64135579. The reversal of 64135539 is 93553146.

64135539 is a `hidden beast` number, since 641 + 3 + 5 + 5 + 3 + 9 = 666.

It is not a de Polignac number, because 64135539 - 2³ = 64135531 is a prime.

It is a super-2 number, since 2×64135539² = 8226734725641042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64135531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46234 + ... + 47600.

It is an arithmetic number, because the mean of its divisors is an integer number (4170348).

Almost surely, 2^64135539 is an apocalyptic number.

64135539 is a deficient number, since it is larger than the sum of its proper divisors (35952813).

64135539 is a wasteful number, since it uses less digits than its factorization.

64135539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787 (or 1784 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 64135539 is about 8008.4667071793. The cubic root of 64135539 is about 400.2821738147.

The spelling of 64135539 in words is "sixty-four million, one hundred thirty-five thousand, five hundred thirty-nine".