64100685410681 has 4 divisors (see below), whose sum is σ = 64294343070864. Its totient is φ = 63907027750500.

The previous prime is 64100685410653. The next prime is 64100685410689. The reversal of 64100685410681 is 18601458600146.

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 64100685410681 - 2¹⁴ = 64100685394297 is a prime.

It is a super-2 number, since 2×64100685410681² (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 (64100685410689) 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, 96828829595 + ... + 96828830256.

It is an arithmetic number, because the mean of its divisors is an integer number (16073585767716).

Almost surely, 2^{64100685410681} is an apocalyptic number.

It is an amenable number.

64100685410681 is a deficient number, since it is larger than the sum of its proper divisors (193657660183).

64100685410681 is a wasteful number, since it uses less digits than its factorization.

64100685410681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193657660182.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 64100685410681 in words is "sixty-four trillion, one hundred billion, six hundred eighty-five million, four hundred ten thousand, six hundred eighty-one".