25321221673 has 16 divisors (see below), whose sum is σ = 27699077952. Its totient is φ = 22956120000.

The previous prime is 25321221649. The next prime is 25321221683. The reversal of 25321221673 is 37612212352.

It is not a de Polignac number, because 25321221673 - 2⁵ = 25321221641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25321221683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7669123 + ... + 7672423.

It is an arithmetic number, because the mean of its divisors is an integer number (1731192372).

Almost surely, 2^25321221673 is an apocalyptic number.

It is an amenable number.

25321221673 is a deficient number, since it is larger than the sum of its proper divisors (2377856279).

25321221673 is a wasteful number, since it uses less digits than its factorization.

25321221673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5016.

The product of its digits is 30240, while the sum is 34.

The spelling of 25321221673 in words is "twenty-five billion, three hundred twenty-one million, two hundred twenty-one thousand, six hundred seventy-three".