64707412257517 has 8 divisors (see below), whose sum is σ = 66232043934912. Its totient is φ = 63199815571200.

The previous prime is 64707412257511. The next prime is 64707412257529. The reversal of 64707412257517 is 71575221470746.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64707412257517 is a prime.

It is a super-2 number, since 2×64707412257517² (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 (64707412257511) 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, 4258740084 + ... + 4258755277.

It is an arithmetic number, because the mean of its divisors is an integer number (8279005491864).

Almost surely, 2^{64707412257517} is an apocalyptic number.

It is an amenable number.

64707412257517 is a deficient number, since it is larger than the sum of its proper divisors (1524631677395).

64707412257517 is a wasteful number, since it uses less digits than its factorization.

64707412257517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8517495539.

The product of its (nonzero) digits is 23049600, while the sum is 58.

The spelling of 64707412257517 in words is "sixty-four trillion, seven hundred seven billion, four hundred twelve million, two hundred fifty-seven thousand, five hundred seventeen".