1825990656 has 96 divisors (see below), whose sum is σ = 5563696320. Its totient is φ = 521699328.

The previous prime is 1825990651. The next prime is 1825990669. The reversal of 1825990656 is 6560995281.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 1825990599 and 1825990608.

It is not an unprimeable number, because it can be changed into a prime (1825990651) 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, 21780 + ... + 64236.

It is an arithmetic number, because the mean of its divisors is an integer number (57955170).

Almost surely, 2^1825990656 is an apocalyptic number.

1825990656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1825990656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2781848160).

1825990656 is an abundant number, since it is smaller than the sum of its proper divisors (3737705664).

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

1825990656 is an equidigital number, since it uses as much as digits as its factorization.

1825990656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42489 (or 42469 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 51.

The square root of 1825990656 is about 42731.6119050054. The cubic root of 1825990656 is about 1222.2672735839.

The spelling of 1825990656 in words is "one billion, eight hundred twenty-five million, nine hundred ninety thousand, six hundred fifty-six".