64625539 has 8 divisors (see below), whose sum is σ = 71160768. Its totient is φ = 58200360.

The previous prime is 64625537. The next prime is 64625563. The reversal of 64625539 is 93552646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64625539 - 2¹ = 64625537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64625537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26277 + ... + 28630.

It is an arithmetic number, because the mean of its divisors is an integer number (8895096).

Almost surely, 2^64625539 is an apocalyptic number.

64625539 is a deficient number, since it is larger than the sum of its proper divisors (6535229).

64625539 is a wasteful number, since it uses less digits than its factorization.

64625539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55025.

The product of its digits is 194400, while the sum is 40.

The square root of 64625539 is about 8039.0011195422. The cubic root of 64625539 is about 401.2989832897.

The spelling of 64625539 in words is "sixty-four million, six hundred twenty-five thousand, five hundred thirty-nine".