64850542668531 has 24 divisors (see below), whose sum is σ = 96369549350256. Its totient is φ = 41998188015360.

The previous prime is 64850542668529. The next prime is 64850542668563. The reversal of 64850542668531 is 13586624505846.

64850542668531 is a `hidden beast` number, since 6 + 4 + 8 + 5 + 0 + 542 + 6 + 6 + 85 + 3 + 1 = 666.

It is not a de Polignac number, because 64850542668531 - 2¹ = 64850542668529 is a prime.

It is a super-3 number, since 3×64850542668531³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (64850542663531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 377052925 + ... + 377224878.

It is an arithmetic number, because the mean of its divisors is an integer number (4015397889594).

Almost surely, 2^{64850542668531} is an apocalyptic number.

64850542668531 is a deficient number, since it is larger than the sum of its proper divisors (31519006681725).

64850542668531 is a wasteful number, since it uses less digits than its factorization.

64850542668531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754278083 (or 754278080 counting only the distinct ones).

The product of its (nonzero) digits is 165888000, while the sum is 63.

The spelling of 64850542668531 in words is "sixty-four trillion, eight hundred fifty billion, five hundred forty-two million, six hundred sixty-eight thousand, five hundred thirty-one".