25243112040 has 64 divisors (see below), whose sum is σ = 76641768000. Its totient is φ = 6650391552.

The previous prime is 25243112039. The next prime is 25243112057. The reversal of 25243112040 is 4021134252.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 25243112040.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1257265 + ... + 1277184.

It is an arithmetic number, because the mean of its divisors is an integer number (1197527625).

Almost surely, 2^25243112040 is an apocalyptic number.

25243112040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25243112040 is an abundant number, since it is smaller than the sum of its proper divisors (51398655960).

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

25243112040 is a wasteful number, since it uses less digits than its factorization.

25243112040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534546 (or 2534542 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 25243112040 its reverse (4021134252), we get a palindrome (29264246292).

The spelling of 25243112040 in words is "twenty-five billion, two hundred forty-three million, one hundred twelve thousand, forty".