99865457255765 has 8 divisors (see below), whose sum is σ = 119843318171520. Its totient is φ = 79889186161552.

The previous prime is 99865457255741. The next prime is 99865457255779. The reversal of 99865457255765 is 56755275456899.

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 99865457255765 - 2³⁰ = 99864383513941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397317185 + ... + 397568454.

It is an arithmetic number, because the mean of its divisors is an integer number (14980414771440).

Almost surely, 2^{99865457255765} is an apocalyptic number.

It is an amenable number.

99865457255765 is a deficient number, since it is larger than the sum of its proper divisors (19977860915755).

99865457255765 is a wasteful number, since it uses less digits than its factorization.

99865457255765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794910771.

The product of its digits is 28576800000, while the sum is 83.

The spelling of 99865457255765 in words is "ninety-nine trillion, eight hundred sixty-five billion, four hundred fifty-seven million, two hundred fifty-five thousand, seven hundred sixty-five".