25502505049 has 4 divisors (see below), whose sum is σ = 29145720064. Its totient is φ = 21859290036.

The previous prime is 25502505047. The next prime is 25502505101. The reversal of 25502505049 is 94050520552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25502505049 - 2¹ = 25502505047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25502504999 and 25502505017.

It is not an unprimeable number, because it can be changed into a prime (25502505047) 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, 1821607497 + ... + 1821607510.

It is an arithmetic number, because the mean of its divisors is an integer number (7286430016).

Almost surely, 2^25502505049 is an apocalyptic number.

It is an amenable number.

25502505049 is a deficient number, since it is larger than the sum of its proper divisors (3643215015).

25502505049 is an equidigital number, since it uses as much as digits as its factorization.

25502505049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643215014.

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 25502505049 in words is "twenty-five billion, five hundred two million, five hundred five thousand, forty-nine".