25858607861000 has 64 divisors (see below), whose sum is σ = 60513670367280. Its totient is φ = 10342669132800.

The previous prime is 25858607860951. The next prime is 25858607861029. The reversal of 25858607861000 is 16870685852.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 9497602185124 + 16361005675876 = 3081818^2 + 4044874^2 .

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, 12496214 + ... + 14417786.

Almost surely, 2^{25858607861000} is an apocalyptic number.

25858607861000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25858607861000 is an abundant number, since it is smaller than the sum of its proper divisors (34655062506280).

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

25858607861000 is a wasteful number, since it uses less digits than its factorization.

25858607861000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935051 (or 1935037 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 56.

The spelling of 25858607861000 in words is "twenty-five trillion, eight hundred fifty-eight billion, six hundred seven million, eight hundred sixty-one thousand".