256733340371767 has 8 divisors (see below), whose sum is σ = 303527101917600. Its totient is φ = 212468971341984.

The previous prime is 256733340371759. The next prime is 256733340371773. The reversal of 256733340371767 is 767173043337652.

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

It is not a de Polignac number, because 256733340371767 - 2³ = 256733340371759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256733340371699 and 256733340371708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256733340171767) 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, 632348128792 + ... + 632348129197.

It is an arithmetic number, because the mean of its divisors is an integer number (37940887739700).

Almost surely, 2^{256733340371767} is an apocalyptic number.

256733340371767 is a deficient number, since it is larger than the sum of its proper divisors (46793761545833).

256733340371767 is a wasteful number, since it uses less digits than its factorization.

256733340371767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264696258025.

The product of its (nonzero) digits is 280052640, while the sum is 64.

The spelling of 256733340371767 in words is "two hundred fifty-six trillion, seven hundred thirty-three billion, three hundred forty million, three hundred seventy-one thousand, seven hundred sixty-seven".