25259381460 has 72 divisors (see below), whose sum is σ = 77108236296. Its totient is φ = 6692924160.

The previous prime is 25259381423. The next prime is 25259381461. The reversal of 25259381460 is 6418395252.

25259381460 is a `hidden beast` number, since 2 + 5 + 25 + 93 + 81 + 460 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5619601296 + 19639780164 = 74964^2 + 140142^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25259381461) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 418651 + ... + 475170.

Almost surely, 2^25259381460 is an apocalyptic number.

25259381460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25259381460 is an abundant number, since it is smaller than the sum of its proper divisors (51848854836).

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

25259381460 is a wasteful number, since it uses less digits than its factorization.

25259381460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893993 (or 893988 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 25259381460 in words is "twenty-five billion, two hundred fifty-nine million, three hundred eighty-one thousand, four hundred sixty".