99767660935391 has 4 divisors (see below), whose sum is σ = 99776899548000. Its totient is φ = 99758422322784.

The previous prime is 99767660935373. The next prime is 99767660935417. The reversal of 99767660935391 is 19353906676799.

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

It is a cyclic number.

It is not a de Polignac number, because 99767660935391 - 2¹⁰ = 99767660934367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99767660935321) 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, 4619290106 + ... + 4619311703.

It is an arithmetic number, because the mean of its divisors is an integer number (24944224887000).

Almost surely, 2^{99767660935391} is an apocalyptic number.

99767660935391 is a deficient number, since it is larger than the sum of its proper divisors (9238612609).

99767660935391 is a wasteful number, since it uses less digits than its factorization.

99767660935391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9238612608.

The product of its (nonzero) digits is 3124873080, while the sum is 80.

The spelling of 99767660935391 in words is "ninety-nine trillion, seven hundred sixty-seven billion, six hundred sixty million, nine hundred thirty-five thousand, three hundred ninety-one".