25123015240 has 48 divisors (see below), whose sum is σ = 59658496380. Its totient is φ = 9520295040.

The previous prime is 25123015223. The next prime is 25123015241. The reversal of 25123015240 is 4251032152.

It can be written as a sum of positive squares in 2 ways, for example, as 23767155556 + 1355859684 = 154166^2 + 36822^2 .

It is not an unprimeable number, because it can be changed into a prime (25123015241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 855471 + ... + 884350.

Almost surely, 2^25123015240 is an apocalyptic number.

25123015240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25123015240 is an abundant number, since it is smaller than the sum of its proper divisors (34535481140).

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

25123015240 is a wasteful number, since it uses less digits than its factorization.

25123015240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739870 (or 1739847 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 25123015240 its reverse (4251032152), we get a palindrome (29374047392).

The spelling of 25123015240 in words is "twenty-five billion, one hundred twenty-three million, fifteen thousand, two hundred forty".