25891013070 has 512 divisors, whose sum is σ = 80898048000. Its totient is φ = 5845063680.

The previous prime is 25891013063. The next prime is 25891013123. The reversal of 25891013070 is 7031019852.

25891013070 is a `hidden beast` number, since 2 + 589 + 1 + 0 + 1 + 3 + 0 + 70 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 237532176 + ... + 237532284.

It is an arithmetic number, because the mean of its divisors is an integer number (158004000).

Almost surely, 2^25891013070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25891013070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40449024000).

25891013070 is an abundant number, since it is smaller than the sum of its proper divisors (55007034930).

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

25891013070 is a wasteful number, since it uses less digits than its factorization.

25891013070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 25891013070 in words is "twenty-five billion, eight hundred ninety-one million, thirteen thousand, seventy".