75681522518657 has 8 divisors (see below), whose sum is σ = 84119428117440. Its totient is φ = 67503244784560.

The previous prime is 75681522518639. The next prime is 75681522518659.

75681522518657 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75681522518657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75681522518659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64906965557 + ... + 64906966722.

It is an arithmetic number, because the mean of its divisors is an integer number (10514928514680).

Almost surely, 2^{75681522518657} is an apocalyptic number.

It is an amenable number.

75681522518657 is a deficient number, since it is larger than the sum of its proper divisors (8437905598783).

75681522518657 is a wasteful number, since it uses less digits than its factorization.

75681522518657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129813932343.

The product of its digits is 282240000, while the sum is 68.

The spelling of 75681522518657 in words is "seventy-five trillion, six hundred eighty-one billion, five hundred twenty-two million, five hundred eighteen thousand, six hundred fifty-seven".