87945125569 has 8 divisors (see below), whose sum is σ = 102559913600. Its totient is φ = 75381535908.

The previous prime is 87945125483. The next prime is 87945125581. The reversal of 87945125569 is 96552154978.

It is not a de Polignac number, because 87945125569 - 2³⁵ = 53585387201 is a prime.

It is a super-2 number, since 2×87945125569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87945125869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128199549 + ... + 128200234.

It is an arithmetic number, because the mean of its divisors is an integer number (12819989200).

Almost surely, 2^87945125569 is an apocalyptic number.

It is an amenable number.

87945125569 is a deficient number, since it is larger than the sum of its proper divisors (14614788031).

87945125569 is an equidigital number, since it uses as much as digits as its factorization.

87945125569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256399804 (or 256399790 counting only the distinct ones).

The product of its digits is 27216000, while the sum is 61.

The spelling of 87945125569 in words is "eighty-seven billion, nine hundred forty-five million, one hundred twenty-five thousand, five hundred sixty-nine".