256019566925 has 24 divisors (see below), whose sum is σ = 336213320256. Its totient is φ = 192724842240.

The previous prime is 256019566853. The next prime is 256019566927. The reversal of 256019566925 is 529665910652.

It is not a de Polignac number, because 256019566925 - 2¹² = 256019562829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256019566927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1917182 + ... + 2046368.

It is an arithmetic number, because the mean of its divisors is an integer number (14008888344).

Almost surely, 2^256019566925 is an apocalyptic number.

256019566925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256019566925 is a deficient number, since it is larger than the sum of its proper divisors (80193753331).

256019566925 is a wasteful number, since it uses less digits than its factorization.

256019566925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133877 (or 133872 counting only the distinct ones).

The product of its (nonzero) digits is 8748000, while the sum is 56.

The spelling of 256019566925 in words is "two hundred fifty-six billion, nineteen million, five hundred sixty-six thousand, nine hundred twenty-five".