25535242550 has 24 divisors (see below), whose sum is σ = 48600102936. Its totient is φ = 9976559040.

The previous prime is 25535242543. The next prime is 25535242571. The reversal of 25535242550 is 5524253552.

It is a super-2 number, since 2×25535242550² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5936279 + ... + 5940578.

It is an arithmetic number, because the mean of its divisors is an integer number (2025004289).

Almost surely, 2^25535242550 is an apocalyptic number.

25535242550 is a deficient number, since it is larger than the sum of its proper divisors (23064860386).

25535242550 is a wasteful number, since it uses less digits than its factorization.

25535242550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11876912 (or 11876907 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 38.

The spelling of 25535242550 in words is "twenty-five billion, five hundred thirty-five million, two hundred forty-two thousand, five hundred fifty".