25685494470 has 160 divisors (see below), whose sum is σ = 73229587200. Its totient is φ = 6441747264.

The previous prime is 25685494459. The next prime is 25685494517. The reversal of 25685494470 is 7449458652.

25685494470 is a `hidden beast` number, since 2 + 5 + 6 + 85 + 4 + 94 + 470 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2133207 + ... + 2145213.

It is an arithmetic number, because the mean of its divisors is an integer number (457684920).

Almost surely, 2^25685494470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25685494470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36614793600).

25685494470 is an abundant number, since it is smaller than the sum of its proper divisors (47544092730).

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

25685494470 is a wasteful number, since it uses less digits than its factorization.

25685494470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12184 (or 12175 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 25685494470 in words is "twenty-five billion, six hundred eighty-five million, four hundred ninety-four thousand, four hundred seventy".