256507773454445 has 8 divisors (see below), whose sum is σ = 307925089473120. Its totient is φ = 205129044545040.

The previous prime is 256507773454301. The next prime is 256507773454447. The reversal of 256507773454445 is 544454377705652.

256507773454445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-256507773454445 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256507773454447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9646762691 + ... + 9646789280.

It is an arithmetic number, because the mean of its divisors is an integer number (38490636184140).

Almost surely, 2^{256507773454445} is an apocalyptic number.

It is an amenable number.

256507773454445 is a deficient number, since it is larger than the sum of its proper divisors (51417316018675).

256507773454445 is a wasteful number, since it uses less digits than its factorization.

256507773454445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19293554635.

The product of its (nonzero) digits is 1975680000, while the sum is 68.

The spelling of 256507773454445 in words is "two hundred fifty-six trillion, five hundred seven billion, seven hundred seventy-three million, four hundred fifty-four thousand, four hundred forty-five".