25540393227840 has 392 divisors, whose sum is σ = 91215617578560. Its totient is φ = 6808513065984.

The previous prime is 25540393227827. The next prime is 25540393227883. The reversal of 25540393227840 is 4872239304552.

25540393227840 is a `hidden beast` number, since 2 + 5 + 5 + 403 + 9 + 3 + 227 + 8 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 774239827 + ... + 774272813.

Almost surely, 2^{25540393227840} is an apocalyptic number.

25540393227840 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 25540393227840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45607808789280).

25540393227840 is an abundant number, since it is smaller than the sum of its proper divisors (65675224350720).

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

25540393227840 is an equidigital number, since it uses as much as digits as its factorization.

25540393227840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36341 (or 36316 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 54.

The spelling of 25540393227840 in words is "twenty-five trillion, five hundred forty billion, three hundred ninety-three million, two hundred twenty-seven thousand, eight hundred forty".