25539158399040 has 1344 divisors, whose sum is σ = 107712734088960. Its totient is φ = 5678266613760.

The previous prime is 25539158398979. The next prime is 25539158399057. The reversal of 25539158399040 is 4099385193552.

25539158399040 is a `hidden beast` number, since 2 + 5 + 5 + 3 + 9 + 1 + 583 + 9 + 9 + 0 + 40 = 666.

It is a super-2 number, since 2×25539158399040² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1745782446 + ... + 1745797074.

It is an arithmetic number, because the mean of its divisors is an integer number (80143403340).

Almost surely, 2^{25539158399040} is an apocalyptic number.

25539158399040 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 25539158399040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53856367044480).

25539158399040 is an abundant number, since it is smaller than the sum of its proper divisors (82173575689920).

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

25539158399040 is a wasteful number, since it uses less digits than its factorization.

25539158399040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14842 (or 14820 counting only the distinct ones).

The product of its (nonzero) digits is 52488000, while the sum is 63.

The spelling of 25539158399040 in words is "twenty-five trillion, five hundred thirty-nine billion, one hundred fifty-eight million, three hundred ninety-nine thousand, forty".