99812937796897 has 8 divisors (see below), whose sum is σ = 107491088147240. Its totient is φ = 92134820597760.

The previous prime is 99812937796889. The next prime is 99812937796937. The reversal of 99812937796897 is 79869773921899.

It can be written as a sum of positive squares in 4 ways, for example, as 7730796545761 + 92082141251136 = 2780431^2 + 9595944^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 99812937796897 - 2³ = 99812937796889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99812937796877) 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, 1849254 + ... + 14249407.

It is an arithmetic number, because the mean of its divisors is an integer number (13436386018405).

Almost surely, 2^{99812937796897} is an apocalyptic number.

It is an amenable number.

99812937796897 is a deficient number, since it is larger than the sum of its proper divisors (7678150350343).

99812937796897 is a wasteful number, since it uses less digits than its factorization.

99812937796897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16575603.

The product of its digits is 46664771328, while the sum is 94.

The spelling of 99812937796897 in words is "ninety-nine trillion, eight hundred twelve billion, nine hundred thirty-seven million, seven hundred ninety-six thousand, eight hundred ninety-seven".