64521534572519 has 8 divisors (see below), whose sum is σ = 64892447753952. Its totient is φ = 64150780079520.

The previous prime is 64521534572513. The next prime is 64521534572533. The reversal of 64521534572519 is 91527543512546.

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 64521534572519 - 2⁸ = 64521534572263 is a prime.

It is a super-2 number, since 2×64521534572519² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64521534572513) 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, 38856539 + ... + 40483004.

It is an arithmetic number, because the mean of its divisors is an integer number (8111555969244).

Almost surely, 2^{64521534572519} is an apocalyptic number.

64521534572519 is a deficient number, since it is larger than the sum of its proper divisors (370913181433).

64521534572519 is a wasteful number, since it uses less digits than its factorization.

64521534572519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79344217.

The product of its digits is 45360000, while the sum is 59.

The spelling of 64521534572519 in words is "sixty-four trillion, five hundred twenty-one billion, five hundred thirty-four million, five hundred seventy-two thousand, five hundred nineteen".