25649927830 has 32 divisors (see below), whose sum is σ = 47882456640. Its totient is φ = 9881182080.

The previous prime is 25649927783. The next prime is 25649927843. The reversal of 25649927830 is 3872994652.

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, 3735 + ... + 226525.

It is an arithmetic number, because the mean of its divisors is an integer number (1496326770).

Almost surely, 2^25649927830 is an apocalyptic number.

25649927830 is a deficient number, since it is larger than the sum of its proper divisors (22232528810).

25649927830 is a wasteful number, since it uses less digits than its factorization.

25649927830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223224.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 25649927830 in words is "twenty-five billion, six hundred forty-nine million, nine hundred twenty-seven thousand, eight hundred thirty".