84925257191 has 4 divisors (see below), whose sum is σ = 86317474584. Its totient is φ = 83533039800.

The previous prime is 84925257169. The next prime is 84925257199. The reversal of 84925257191 is 19175252948.

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 84925257191 - 2³⁰ = 83851515367 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 (84925257199) 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, 696108605 + ... + 696108726.

It is an arithmetic number, because the mean of its divisors is an integer number (21579368646).

Almost surely, 2^84925257191 is an apocalyptic number.

84925257191 is a deficient number, since it is larger than the sum of its proper divisors (1392217393).

84925257191 is a wasteful number, since it uses less digits than its factorization.

84925257191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392217392.

The product of its digits is 1814400, while the sum is 53.

The spelling of 84925257191 in words is "eighty-four billion, nine hundred twenty-five million, two hundred fifty-seven thousand, one hundred ninety-one".