256776245 has 16 divisors (see below), whose sum is σ = 355917888. Its totient is φ = 175760640.

The previous prime is 256776173. The next prime is 256776281. The reversal of 256776245 is 542677652.

256776245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256776245 - 2¹⁰ = 256775221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256776196 and 256776205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136379 + ... + 138248.

It is an arithmetic number, because the mean of its divisors is an integer number (22244868).

Almost surely, 2^256776245 is an apocalyptic number.

It is an amenable number.

256776245 is a deficient number, since it is larger than the sum of its proper divisors (99141643).

256776245 is a wasteful number, since it uses less digits than its factorization.

256776245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274660.

The product of its digits is 705600, while the sum is 44.

The square root of 256776245 is about 16024.2392955173. The cubic root of 256776245 is about 635.6015503616.

The spelling of 256776245 in words is "two hundred fifty-six million, seven hundred seventy-six thousand, two hundred forty-five".