97918994785 has 4 divisors (see below), whose sum is σ = 117502793748. Its totient is φ = 78335195824.

The previous prime is 97918994753. The next prime is 97918994791. The reversal of 97918994785 is 58749981979.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11558830144 + 86360164641 = 107512^2 + 293871^2 .

It is a cyclic number.

It is not a de Polignac number, because 97918994785 - 2⁵ = 97918994753 is a prime.

It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9791899474 + ... + 9791899483.

It is an arithmetic number, because the mean of its divisors is an integer number (29375698437).

Almost surely, 2^97918994785 is an apocalyptic number.

It is an amenable number.

97918994785 is a deficient number, since it is larger than the sum of its proper divisors (19583798963).

97918994785 is a wasteful number, since it uses less digits than its factorization.

97918994785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19583798962.

The product of its digits is 411505920, while the sum is 76.

The spelling of 97918994785 in words is "ninety-seven billion, nine hundred eighteen million, nine hundred ninety-four thousand, seven hundred eighty-five".