256378277075 has 12 divisors (see below), whose sum is σ = 323120689488. Its totient is φ = 201740282400.

The previous prime is 256378277041. The next prime is 256378277101. The reversal of 256378277075 is 570772873652.

It is not a de Polignac number, because 256378277075 - 2⁶ = 256378277011 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84056927 + ... + 84059976.

It is an arithmetic number, because the mean of its divisors is an integer number (26926724124).

Almost surely, 2^256378277075 is an apocalyptic number.

256378277075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256378277075 is a deficient number, since it is larger than the sum of its proper divisors (66742412413).

256378277075 is a wasteful number, since it uses less digits than its factorization.

256378277075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168116974 (or 168116969 counting only the distinct ones).

The product of its (nonzero) digits is 34574400, while the sum is 59.

The spelling of 256378277075 in words is "two hundred fifty-six billion, three hundred seventy-eight million, two hundred seventy-seven thousand, seventy-five".