64314721965315 has 32 divisors (see below), whose sum is σ = 103380320010240. Its totient is φ = 34142391780224.

The previous prime is 64314721965313. The next prime is 64314721965359. The reversal of 64314721965315 is 51356912741346.

It is a Cunningham number, because it is equal to 8019646²-1.

It is a cyclic number.

It is not a de Polignac number, because 64314721965315 - 2¹ = 64314721965313 is a prime.

It is a super-2 number, since 2×64314721965315² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64314721965313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4009822 + ... + 12029468.

It is an arithmetic number, because the mean of its divisors is an integer number (3230635000320).

Almost surely, 2^{64314721965315} is an apocalyptic number.

64314721965315 is a deficient number, since it is larger than the sum of its proper divisors (39065598044925).

64314721965315 is a wasteful number, since it uses less digits than its factorization.

64314721965315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8022131.

The product of its digits is 16329600, while the sum is 57.

The spelling of 64314721965315 in words is "sixty-four trillion, three hundred fourteen billion, seven hundred twenty-one million, nine hundred sixty-five thousand, three hundred fifteen".