25612321893 has 16 divisors (see below), whose sum is σ = 35000522496. Its totient is φ = 16652088320.

The previous prime is 25612321829. The next prime is 25612321913. The reversal of 25612321893 is 39812321652.

It is a cyclic number.

It is not a de Polignac number, because 25612321893 - 2⁶ = 25612321829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25612321093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283596 + ... + 362837.

It is an arithmetic number, because the mean of its divisors is an integer number (2187532656).

Almost surely, 2^25612321893 is an apocalyptic number.

It is an amenable number.

25612321893 is a deficient number, since it is larger than the sum of its proper divisors (9388200603).

25612321893 is a wasteful number, since it uses less digits than its factorization.

25612321893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646764.

The product of its digits is 155520, while the sum is 42.

The spelling of 25612321893 in words is "twenty-five billion, six hundred twelve million, three hundred twenty-one thousand, eight hundred ninety-three".