64538063309357 has 16 divisors (see below), whose sum is σ = 70772731603200. Its totient is φ = 58364742690240.

The previous prime is 64538063309339. The next prime is 64538063309393. The reversal of 64538063309357 is 75390336083546.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64538063309357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64538063309357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64538063809357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12940319 + ... + 17219987.

It is an arithmetic number, because the mean of its divisors is an integer number (4423295725200).

Almost surely, 2^{64538063309357} is an apocalyptic number.

It is an amenable number.

64538063309357 is a deficient number, since it is larger than the sum of its proper divisors (6234668293843).

64538063309357 is a wasteful number, since it uses less digits than its factorization.

64538063309357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4286836.

The product of its (nonzero) digits is 146966400, while the sum is 62.

The spelling of 64538063309357 in words is "sixty-four trillion, five hundred thirty-eight billion, sixty-three million, three hundred nine thousand, three hundred fifty-seven".