25312647872540 has 216 divisors, whose sum is σ = 65701717401600. Its totient is φ = 8166223951872.

The previous prime is 25312647872503. The next prime is 25312647872543. The reversal of 25312647872540 is 4527874621352.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25312647872543) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1739813186 + ... + 1739827734.

It is an arithmetic number, because the mean of its divisors is an integer number (304174617600).

Almost surely, 2^{25312647872540} is an apocalyptic number.

25312647872540 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 25312647872540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32850858700800).

25312647872540 is an abundant number, since it is smaller than the sum of its proper divisors (40389069529060).

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

25312647872540 is a wasteful number, since it uses less digits than its factorization.

25312647872540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20749 (or 20723 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 56.

The spelling of 25312647872540 in words is "twenty-five trillion, three hundred twelve billion, six hundred forty-seven million, eight hundred seventy-two thousand, five hundred forty".