64896915249539 has 16 divisors (see below), whose sum is σ = 65675887990272. Its totient is φ = 64122625509408.

The previous prime is 64896915249443. The next prime is 64896915249547. The reversal of 64896915249539 is 93594251969846.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64896915249539 is a prime.

It is a super-3 number, since 3×64896915249539³ (a number of 42 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64896915249559) 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, 682452854 + ... + 682547940.

It is an arithmetic number, because the mean of its divisors is an integer number (4104742999392).

Almost surely, 2^{64896915249539} is an apocalyptic number.

64896915249539 is a deficient number, since it is larger than the sum of its proper divisors (778972740733).

64896915249539 is a wasteful number, since it uses less digits than its factorization.

64896915249539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119626.

The product of its digits is 4534963200, while the sum is 80.

The spelling of 64896915249539 in words is "sixty-four trillion, eight hundred ninety-six billion, nine hundred fifteen million, two hundred forty-nine thousand, five hundred thirty-nine".