64166350133615 has 4 divisors (see below), whose sum is σ = 76999620160344. Its totient is φ = 51333080106888.

The previous prime is 64166350133539. The next prime is 64166350133617. The reversal of 64166350133615 is 51633105366146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64166350133615 - 2¹⁸ = 64166349871471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64166350133617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6416635013357 + ... + 6416635013366.

It is an arithmetic number, because the mean of its divisors is an integer number (19249905040086).

Almost surely, 2^{64166350133615} is an apocalyptic number.

64166350133615 is a deficient number, since it is larger than the sum of its proper divisors (12833270026729).

64166350133615 is a wasteful number, since it uses less digits than its factorization.

64166350133615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12833270026728.

The product of its (nonzero) digits is 3499200, while the sum is 50.

The spelling of 64166350133615 in words is "sixty-four trillion, one hundred sixty-six billion, three hundred fifty million, one hundred thirty-three thousand, six hundred fifteen".