64896539975541 has 24 divisors (see below), whose sum is σ = 99258959403864. Its totient is φ = 40717170892800.

The previous prime is 64896539975539. The next prime is 64896539975551. The reversal of 64896539975541 is 14557993569846.

64896539975541 is a `hidden beast` number, since 6 + 4 + 8 + 9 + 6 + 53 + 9 + 9 + 7 + 554 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5215445550225 + 59681094425316 = 2283735^2 + 7725354^2 .

It is not a de Polignac number, because 64896539975541 - 2¹ = 64896539975539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64896539975551) 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, 8788396 + ... + 14388501.

It is an arithmetic number, because the mean of its divisors is an integer number (4135789975161).

Almost surely, 2^{64896539975541} is an apocalyptic number.

It is an amenable number.

64896539975541 is a deficient number, since it is larger than the sum of its proper divisors (34362419428323).

64896539975541 is a wasteful number, since it uses less digits than its factorization.

64896539975541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23195221 (or 23195218 counting only the distinct ones).

The product of its digits is 8817984000, while the sum is 81.

The spelling of 64896539975541 in words is "sixty-four trillion, eight hundred ninety-six billion, five hundred thirty-nine million, nine hundred seventy-five thousand, five hundred forty-one".