25454786940 has 216 divisors, whose sum is σ = 85898960784. Its totient is φ = 6096076800.

The previous prime is 25454786939. The next prime is 25454786963. The reversal of 25454786940 is 4968745452.

25454786940 is a `hidden beast` number, since 2 + 5 + 4 + 547 + 8 + 6 + 94 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1800700 + ... + 1814780.

It is an arithmetic number, because the mean of its divisors is an integer number (397680374).

Almost surely, 2^25454786940 is an apocalyptic number.

25454786940 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 25454786940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42949480392).

25454786940 is an abundant number, since it is smaller than the sum of its proper divisors (60444173844).

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

25454786940 is a wasteful number, since it uses less digits than its factorization.

25454786940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14201 (or 14185 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 25454786940 in words is "twenty-five billion, four hundred fifty-four million, seven hundred eighty-six thousand, nine hundred forty".