25450552553 has 4 divisors (see below), whose sum is σ = 25867774788. Its totient is φ = 25033330320.

The previous prime is 25450552541. The next prime is 25450552579. The reversal of 25450552553 is 35525505452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2894117209 + 22556435344 = 53797^2 + 150188^2 .

It is a cyclic number.

It is not a de Polignac number, because 25450552553 - 2⁶ = 25450552489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25450552553.

It is not an unprimeable number, because it can be changed into a prime (25450552583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208611026 + ... + 208611147.

It is an arithmetic number, because the mean of its divisors is an integer number (6466943697).

Almost surely, 2^25450552553 is an apocalyptic number.

It is an amenable number.

25450552553 is a deficient number, since it is larger than the sum of its proper divisors (417222235).

25450552553 is an equidigital number, since it uses as much as digits as its factorization.

25450552553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417222234.

The product of its (nonzero) digits is 750000, while the sum is 41.

The spelling of 25450552553 in words is "twenty-five billion, four hundred fifty million, five hundred fifty-two thousand, five hundred fifty-three".