25491623485536 has 1152 divisors, whose sum is σ = 84975457222656. Its totient is φ = 7466363412480.

The previous prime is 25491623485499. The next prime is 25491623485547. The reversal of 25491623485536 is 63558432619452.

25491623485536 is a `hidden beast` number, since 2 + 5 + 4 + 9 + 1 + 62 + 34 + 8 + 5 + 536 = 666.

It is a congruent number.

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, 33674535270 + ... + 33674536026.

It is an arithmetic number, because the mean of its divisors is an integer number (73763417728).

Almost surely, 2^{25491623485536} is an apocalyptic number.

25491623485536 is a gapful number since it is divisible by the number (26) 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 25491623485536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42487728611328).

25491623485536 is an abundant number, since it is smaller than the sum of its proper divisors (59483833737120).

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

25491623485536 is a wasteful number, since it uses less digits than its factorization.

25491623485536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026 (or 1006 counting only the distinct ones).

The product of its digits is 186624000, while the sum is 63.

The spelling of 25491623485536 in words is "twenty-five trillion, four hundred ninety-one billion, six hundred twenty-three million, four hundred eighty-five thousand, five hundred thirty-six".