91667157842947 has 4 divisors (see below), whose sum is σ = 94828094320320. Its totient is φ = 88506221365576.

The previous prime is 91667157842797. The next prime is 91667157842959. The reversal of 91667157842947 is 74924875176619.

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-91667157842947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91667157842977) 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, 1580468238643 + ... + 1580468238700.

It is an arithmetic number, because the mean of its divisors is an integer number (23707023580080).

Almost surely, 2^{91667157842947} is an apocalyptic number.

91667157842947 is a deficient number, since it is larger than the sum of its proper divisors (3160936477373).

91667157842947 is a wasteful number, since it uses less digits than its factorization.

91667157842947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160936477372.

The product of its digits is 1280240640, while the sum is 76.

The spelling of 91667157842947 in words is "ninety-one trillion, six hundred sixty-seven billion, one hundred fifty-seven million, eight hundred forty-two thousand, nine hundred forty-seven".