25523031560 has 128 divisors (see below), whose sum is σ = 62590752000. Its totient is φ = 9310878720.

The previous prime is 25523031557. The next prime is 25523031587. The reversal of 25523031560 is 6513032552.

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, 16245575 + ... + 16247145.

It is an arithmetic number, because the mean of its divisors is an integer number (488990250).

Almost surely, 2^25523031560 is an apocalyptic number.

25523031560 is a gapful number since it is divisible by the number (20) 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 25523031560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31295376000).

25523031560 is an abundant number, since it is smaller than the sum of its proper divisors (37067720440).

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

25523031560 is a wasteful number, since it uses less digits than its factorization.

25523031560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951 (or 1947 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 25523031560 in words is "twenty-five billion, five hundred twenty-three million, thirty-one thousand, five hundred sixty".