25820061582 has 32 divisors (see below), whose sum is σ = 59033048832. Its totient is φ = 7375189824.

The previous prime is 25820061503. The next prime is 25820061593. The reversal of 25820061582 is 28516002852.

It is a self number, because there is not a number n which added to its sum of digits gives 25820061582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80793 + ... + 241179.

It is an arithmetic number, because the mean of its divisors is an integer number (1844782776).

Almost surely, 2^25820061582 is an apocalyptic number.

25820061582 is an abundant number, since it is smaller than the sum of its proper divisors (33212987250).

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

25820061582 is a wasteful number, since it uses less digits than its factorization.

25820061582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164232.

The product of its (nonzero) digits is 76800, while the sum is 39.

The spelling of 25820061582 in words is "twenty-five billion, eight hundred twenty million, sixty-one thousand, five hundred eighty-two".