25628992273 has 4 divisors (see below), whose sum is σ = 25792234420. Its totient is φ = 25465750128.

The previous prime is 25628992271. The next prime is 25628992331. The reversal of 25628992273 is 37229982652.

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 14048649729 + 11580342544 = 118527^2 + 107612^2 .

It is a cyclic number.

It is not a de Polignac number, because 25628992273 - 2¹ = 25628992271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25628992271) 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, 81620838 + ... + 81621151.

It is an arithmetic number, because the mean of its divisors is an integer number (6448058605).

Almost surely, 2^25628992273 is an apocalyptic number.

It is an amenable number.

25628992273 is a deficient number, since it is larger than the sum of its proper divisors (163242147).

25628992273 is a wasteful number, since it uses less digits than its factorization.

25628992273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163242146.

The product of its digits is 6531840, while the sum is 55.

The spelling of 25628992273 in words is "twenty-five billion, six hundred twenty-eight million, nine hundred ninety-two thousand, two hundred seventy-three".