25671613856 has 96 divisors (see below), whose sum is σ = 61680890880. Its totient is φ = 10279987200.

The previous prime is 25671613819. The next prime is 25671613867. The reversal of 25671613856 is 65831617652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137636 + ... + 265116.

It is an arithmetic number, because the mean of its divisors is an integer number (642509280).

Almost surely, 2^25671613856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25671613856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30840445440).

25671613856 is an abundant number, since it is smaller than the sum of its proper divisors (36009277024).

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

25671613856 is a wasteful number, since it uses less digits than its factorization.

25671613856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127558 (or 127550 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 50.

The spelling of 25671613856 in words is "twenty-five billion, six hundred seventy-one million, six hundred thirteen thousand, eight hundred fifty-six".