8425943691 has 16 divisors (see below), whose sum is σ = 12297761280. Its totient is φ = 5089197920.

The previous prime is 8425943663. The next prime is 8425943741. The reversal of 8425943691 is 1963495248.

It is a cyclic number.

It is not a de Polignac number, because 8425943691 - 2²⁵ = 8392389259 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (8425903691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426051 + ... + 445388.

It is an arithmetic number, because the mean of its divisors is an integer number (768610080).

Almost surely, 2^8425943691 is an apocalyptic number.

8425943691 is a deficient number, since it is larger than the sum of its proper divisors (3871817589).

8425943691 is a wasteful number, since it uses less digits than its factorization.

8425943691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871746.

The product of its digits is 1866240, while the sum is 51.

The square root of 8425943691 is about 91792.9392219249. The cubic root of 8425943691 is about 2034.8833463467.

The spelling of 8425943691 in words is "eight billion, four hundred twenty-five million, nine hundred forty-three thousand, six hundred ninety-one".