25508532450 has 48 divisors (see below), whose sum is σ = 63415985760. Its totient is φ = 6785627520.

The previous prime is 25508532449. The next prime is 25508532461. The reversal of 25508532450 is 5423580552.

It is a junction number, because it is equal to n+sod(n) for n = 25508532399 and 25508532408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146544 + ... + 269243.

It is an arithmetic number, because the mean of its divisors is an integer number (1321166370).

Almost surely, 2^25508532450 is an apocalyptic number.

25508532450 is an abundant number, since it is smaller than the sum of its proper divisors (37907453310).

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

25508532450 is a wasteful number, since it uses less digits than its factorization.

25508532450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416211 (or 416206 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 39.

The spelling of 25508532450 in words is "twenty-five billion, five hundred eight million, five hundred thirty-two thousand, four hundred fifty".