91945022159 has 4 divisors (see below), whose sum is σ = 91946147904. Its totient is φ = 91943896416.

The previous prime is 91945022131. The next prime is 91945022161. The reversal of 91945022159 is 95122054919.

It is a happy number.

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 91945022159 - 2³⁶ = 23225545423 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 (91945027159) 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, 429887 + ... + 607200.

It is an arithmetic number, because the mean of its divisors is an integer number (22986536976).

Almost surely, 2^91945022159 is an apocalyptic number.

91945022159 is a deficient number, since it is larger than the sum of its proper divisors (1125745).

91945022159 is a wasteful number, since it uses less digits than its factorization.

91945022159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125744.

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 91945022159 in words is "ninety-one billion, nine hundred forty-five million, twenty-two thousand, one hundred fifty-nine".