256621050762422 has 4 divisors (see below), whose sum is σ = 384931576143636. Its totient is φ = 128310525381210.

The previous prime is 256621050762347. The next prime is 256621050762437. The reversal of 256621050762422 is 224267050126652.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64155262690604 + ... + 64155262690607.

It is an arithmetic number, because the mean of its divisors is an integer number (96232894035909).

Almost surely, 2^{256621050762422} is an apocalyptic number.

256621050762422 is a deficient number, since it is larger than the sum of its proper divisors (128310525381214).

256621050762422 is a wasteful number, since it uses less digits than its factorization.

256621050762422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128310525381213.

The product of its (nonzero) digits is 4838400, while the sum is 50.

The spelling of 256621050762422 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, fifty million, seven hundred sixty-two thousand, four hundred twenty-two".