25851047650 has 24 divisors (see below), whose sum is σ = 48897919440. Its totient is φ = 10165156560.

The previous prime is 25851047623. The next prime is 25851047657. The reversal of 25851047650 is 5674015852.

It is a junction number, because it is equal to n+sod(n) for n = 25851047597 and 25851047606.

It is not an unprimeable number, because it can be changed into a prime (25851047657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4378584 + ... + 4384483.

It is an arithmetic number, because the mean of its divisors is an integer number (2037413310).

Almost surely, 2^25851047650 is an apocalyptic number.

25851047650 is a deficient number, since it is larger than the sum of its proper divisors (23046871790).

25851047650 is a wasteful number, since it uses less digits than its factorization.

25851047650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8763138 (or 8763133 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 25851047650 in words is "twenty-five billion, eight hundred fifty-one million, forty-seven thousand, six hundred fifty".