64524241136681 has 4 divisors (see below), whose sum is σ = 64525073323392. Its totient is φ = 64523408949972.

The previous prime is 64524241136669. The next prime is 64524241136687. The reversal of 64524241136681 is 18663114242546.

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 64524241136681 - 2⁶ = 64524241136617 is a prime.

It is a super-2 number, since 2×64524241136681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64524241136687) 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, 415977041 + ... + 416132126.

It is an arithmetic number, because the mean of its divisors is an integer number (16131268330848).

Almost surely, 2^{64524241136681} is an apocalyptic number.

It is an amenable number.

64524241136681 is a deficient number, since it is larger than the sum of its proper divisors (832186711).

64524241136681 is an equidigital number, since it uses as much as digits as its factorization.

64524241136681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832186710.

The product of its digits is 6635520, while the sum is 53.

It can be divided in two parts, 645242 and 41136681, that added together give a cube (41781923 = 347³).

The spelling of 64524241136681 in words is "sixty-four trillion, five hundred twenty-four billion, two hundred forty-one million, one hundred thirty-six thousand, six hundred eighty-one".