825555885 has 64 divisors (see below), whose sum is σ = 1700020224. Its totient is φ = 332006400.

The previous prime is 825555881. The next prime is 825555949. The reversal of 825555885 is 588555528.

It is not a de Polignac number, because 825555885 - 2² = 825555881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825555881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24277 + ... + 47333.

It is an arithmetic number, because the mean of its divisors is an integer number (26562816).

Almost surely, 2^825555885 is an apocalyptic number.

It is an amenable number.

825555885 is an abundant number, since it is smaller than the sum of its proper divisors (874464339).

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

825555885 is a wasteful number, since it uses less digits than its factorization.

825555885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23114.

The product of its digits is 3200000, while the sum is 51.

The square root of 825555885 is about 28732.4883189744. The cubic root of 825555885 is about 938.0993301974.

The spelling of 825555885 in words is "eight hundred twenty-five million, five hundred fifty-five thousand, eight hundred eighty-five".