25780280053 has 4 divisors (see below), whose sum is σ = 28123941888. Its totient is φ = 23436618220.

The previous prime is 25780280039. The next prime is 25780280081. The reversal of 25780280053 is 35008208752.

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 25780280053 - 2⁵ = 25780280021 is a prime.

It is a super-2 number, since 2×25780280053² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25780279988 and 25780280015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25780230053) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1171830901 + ... + 1171830922.

It is an arithmetic number, because the mean of its divisors is an integer number (7030985472).

Almost surely, 2^25780280053 is an apocalyptic number.

It is an amenable number.

25780280053 is a deficient number, since it is larger than the sum of its proper divisors (2343661835).

25780280053 is a wasteful number, since it uses less digits than its factorization.

25780280053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2343661834.

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 25780280053 in words is "twenty-five billion, seven hundred eighty million, two hundred eighty thousand, fifty-three".