25431952050 has 144 divisors (see below), whose sum is σ = 72416391840. Its totient is φ = 6562749600.

The previous prime is 25431951871. The next prime is 25431952069. The reversal of 25431952050 is 5025913452.

It is a happy number.

25431952050 is a `hidden beast` number, since 2 + 54 + 31 + 9 + 520 + 50 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25431951996 and 25431952014.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1287549 + ... + 1307151.

It is an arithmetic number, because the mean of its divisors is an integer number (502891610).

Almost surely, 2^25431952050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25431952050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36208195920).

25431952050 is an abundant number, since it is smaller than the sum of its proper divisors (46984439790).

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

25431952050 is a wasteful number, since it uses less digits than its factorization.

25431952050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19686 (or 19644 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 25431952050 in words is "twenty-five billion, four hundred thirty-one million, nine hundred fifty-two thousand, fifty".