825985121910 has 64 divisors (see below), whose sum is σ = 2180276324352. Its totient is φ = 198993465216.

The previous prime is 825985121893. The next prime is 825985121939. The reversal of 825985121910 is 19121589528.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22512634 + ... + 22549293.

It is an arithmetic number, because the mean of its divisors is an integer number (34066817568).

Almost surely, 2^825985121910 is an apocalyptic number.

825985121910 is an abundant number, since it is smaller than the sum of its proper divisors (1354291202442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

825985121910 is a wasteful number, since it uses less digits than its factorization.

825985121910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45061997.

The product of its (nonzero) digits is 518400, while the sum is 51.

The spelling of 825985121910 in words is "eight hundred twenty-five billion, nine hundred eighty-five million, one hundred twenty-one thousand, nine hundred ten".