64537080991017 has 4 divisors (see below), whose sum is σ = 86049441321360. Its totient is φ = 43024720660676.

The previous prime is 64537080991003. The next prime is 64537080991037. The reversal of 64537080991017 is 71019908073546.

64537080991017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64537080991017 - 2⁸ = 64537080990761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64537080991037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10756180165167 + ... + 10756180165172.

It is an arithmetic number, because the mean of its divisors is an integer number (21512360330340).

Almost surely, 2^{64537080991017} is an apocalyptic number.

It is an amenable number.

64537080991017 is a deficient number, since it is larger than the sum of its proper divisors (21512360330343).

64537080991017 is a wasteful number, since it uses less digits than its factorization.

64537080991017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21512360330342.

The product of its (nonzero) digits is 11430720, while the sum is 60.

The spelling of 64537080991017 in words is "sixty-four trillion, five hundred thirty-seven billion, eighty million, nine hundred ninety-one thousand, seventeen".