256061623 has 4 divisors (see below), whose sum is σ = 256187808. Its totient is φ = 255935440.

The previous prime is 256061621. The next prime is 256061627. The reversal of 256061623 is 326160652.

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

It is a cyclic number.

It is not a de Polignac number, because 256061623 - 2¹ = 256061621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256061621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59998 + ... + 64123.

It is an arithmetic number, because the mean of its divisors is an integer number (64046952).

Almost surely, 2^256061623 is an apocalyptic number.

256061623 is a deficient number, since it is larger than the sum of its proper divisors (126185).

256061623 is a wasteful number, since it uses less digits than its factorization.

256061623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126184.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 256061623 is about 16001.9256028767. The cubic root of 256061623 is about 635.0113648327.

The spelling of 256061623 in words is "two hundred fifty-six million, sixty-one thousand, six hundred twenty-three".