25140939840 has 448 divisors, whose sum is σ = 96597216000. Its totient is φ = 6131220480.

The previous prime is 25140939827. The next prime is 25140939851. The reversal of 25140939840 is 4893904152.

25140939840 is a `hidden beast` number, since 2 + 514 + 0 + 9 + 3 + 98 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4758000 + ... + 4763280.

Almost surely, 2^25140939840 is an apocalyptic number.

25140939840 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 25140939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48298608000).

25140939840 is an abundant number, since it is smaller than the sum of its proper divisors (71456276160).

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

25140939840 is a wasteful number, since it uses less digits than its factorization.

25140939840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355 (or 5339 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 25140939840 in words is "twenty-five billion, one hundred forty million, nine hundred thirty-nine thousand, eight hundred forty".