25868876544 has 162 divisors, whose sum is σ = 86764090140. Its totient is φ = 7391075328.

The previous prime is 25868876531. The next prime is 25868876581. The reversal of 25868876544 is 44567886852.

25868876544 is a `hidden beast` number, since 2 + 5 + 8 + 6 + 8 + 87 + 6 + 544 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1674 + ... + 227465.

Almost surely, 2^25868876544 is an apocalyptic number.

25868876544 is a gapful number since it is divisible by the number (24) 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 25868876544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43382045070).

25868876544 is an abundant number, since it is smaller than the sum of its proper divisors (60895213596).

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

25868876544 is a wasteful number, since it uses less digits than its factorization.

25868876544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229175 (or 229151 counting only the distinct ones).

The product of its digits is 103219200, while the sum is 63.

The spelling of 25868876544 in words is "twenty-five billion, eight hundred sixty-eight million, eight hundred seventy-six thousand, five hundred forty-four".