25447679280 has 240 divisors, whose sum is σ = 91488144384. Its totient is φ = 6566987520.

The previous prime is 25447679269. The next prime is 25447679333. The reversal of 25447679280 is 8297674452.

25447679280 is a `hidden beast` number, since 2 + 5 + 4 + 476 + 7 + 92 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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 (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 581527 + ... + 623753.

Almost surely, 2^25447679280 is an apocalyptic number.

25447679280 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 25447679280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45744072192).

25447679280 is an abundant number, since it is smaller than the sum of its proper divisors (66040465104).

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

25447679280 is a wasteful number, since it uses less digits than its factorization.

25447679280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42286 (or 42268 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 25447679280 in words is "twenty-five billion, four hundred forty-seven million, six hundred seventy-nine thousand, two hundred eighty".