256060820194 has 4 divisors (see below), whose sum is σ = 384091230294. Its totient is φ = 128030410096.

The previous prime is 256060820153. The next prime is 256060820207. The reversal of 256060820194 is 491028060652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 237399894169 + 18660926025 = 487237^2 + 136605^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 256060820194.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64015205047 + ... + 64015205050.

Almost surely, 2^256060820194 is an apocalyptic number.

256060820194 is a deficient number, since it is larger than the sum of its proper divisors (128030410100).

256060820194 is a wasteful number, since it uses less digits than its factorization.

256060820194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128030410099.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 256060820194 in words is "two hundred fifty-six billion, sixty million, eight hundred twenty thousand, one hundred ninety-four".