25585098870 has 64 divisors (see below), whose sum is σ = 63432843264. Its totient is φ = 6597624960.

The previous prime is 25585098853. The next prime is 25585098871. The reversal of 25585098870 is 7889058552.

It is a self number, because there is not a number n which added to its sum of digits gives 25585098870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25585098871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1313724 + ... + 1333056.

It is an arithmetic number, because the mean of its divisors is an integer number (991138176).

Almost surely, 2^25585098870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25585098870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31716421632).

25585098870 is an abundant number, since it is smaller than the sum of its proper divisors (37847744394).

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

25585098870 is a wasteful number, since it uses less digits than its factorization.

25585098870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20797.

The product of its (nonzero) digits is 8064000, while the sum is 57.

The spelling of 25585098870 in words is "twenty-five billion, five hundred eighty-five million, ninety-eight thousand, eight hundred seventy".