25900772646 has 16 divisors (see below), whose sum is σ = 59201766144. Its totient is φ = 7400220744.

The previous prime is 25900772587. The next prime is 25900772657. The reversal of 25900772646 is 64627700952.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25900772595 and 25900772604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308342490 + ... + 308342573.

It is an arithmetic number, because the mean of its divisors is an integer number (3700110384).

Almost surely, 2^25900772646 is an apocalyptic number.

25900772646 is an abundant number, since it is smaller than the sum of its proper divisors (33300993498).

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

25900772646 is a wasteful number, since it uses less digits than its factorization.

25900772646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616685075.

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 25900772646 in words is "twenty-five billion, nine hundred million, seven hundred seventy-two thousand, six hundred forty-six".