97918637257799 has 4 divisors (see below), whose sum is σ = 99018846665280. Its totient is φ = 96818427850320.

The previous prime is 97918637257789. The next prime is 97918637257811. The reversal of 97918637257799 is 99775273681979.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97918637257799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (89), and also a Moran number because the ratio is a prime number: 1100209407391 = 97918637257799 / (9 + 7 + 9 + 1 + 8 + 6 + 3 + 7 + 2 + 5 + 7 + 7 + 9 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97918637257789) 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, 550104703607 + ... + 550104703784.

It is an arithmetic number, because the mean of its divisors is an integer number (24754711666320).

Almost surely, 2^{97918637257799} is an apocalyptic number.

97918637257799 is a deficient number, since it is larger than the sum of its proper divisors (1100209407481).

97918637257799 is a wasteful number, since it uses less digits than its factorization.

97918637257799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100209407480.

The product of its digits is 22684263840, while the sum is 89.

The spelling of 97918637257799 in words is "ninety-seven trillion, nine hundred eighteen billion, six hundred thirty-seven million, two hundred fifty-seven thousand, seven hundred ninety-nine".