25285165950 has 48 divisors (see below), whose sum is σ = 68407871616. Its totient is φ = 6129736800.

The previous prime is 25285165837. The next prime is 25285165967. The reversal of 25285165950 is 5956158252.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25285165950.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7660522 + ... + 7663821.

It is an arithmetic number, because the mean of its divisors is an integer number (1425163992).

Almost surely, 2^25285165950 is an apocalyptic number.

25285165950 is an abundant number, since it is smaller than the sum of its proper divisors (43122705666).

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

25285165950 is a wasteful number, since it uses less digits than its factorization.

25285165950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15324369 (or 15324364 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 48.

It can be divided in two parts, 252851 and 65950, that added together give a triangular number (318801 = T₇₉₈).

The spelling of 25285165950 in words is "twenty-five billion, two hundred eighty-five million, one hundred sixty-five thousand, nine hundred fifty".