872169725525 has 48 divisors (see below), whose sum is σ = 1276419732480. Its totient is φ = 578512972800.

The previous prime is 872169725507. The next prime is 872169725549. The reversal of 872169725525 is 525527961278.

It is a happy number.

It is not a de Polignac number, because 872169725525 - 2²² = 872165531221 is a prime.

It is a super-3 number, since 3×872169725525³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12752621 + ... + 12820829.

It is an arithmetic number, because the mean of its divisors is an integer number (26592077760).

Almost surely, 2^872169725525 is an apocalyptic number.

It is an amenable number.

872169725525 is a deficient number, since it is larger than the sum of its proper divisors (404250006955).

872169725525 is a wasteful number, since it uses less digits than its factorization.

872169725525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70614 (or 70609 counting only the distinct ones).

The product of its digits is 21168000, while the sum is 59.

The spelling of 872169725525 in words is "eight hundred seventy-two billion, one hundred sixty-nine million, seven hundred twenty-five thousand, five hundred twenty-five".