256464562 has 16 divisors (see below), whose sum is σ = 395062272. Its totient is φ = 124815600.

The previous prime is 256464493. The next prime is 256464569. The reversal of 256464562 is 265464652.

It is not an unprimeable number, because it can be changed into a prime (256464569) 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, 3937 + ... + 22987.

It is an arithmetic number, because the mean of its divisors is an integer number (24691392).

Almost surely, 2^256464562 is an apocalyptic number.

256464562 is a deficient number, since it is larger than the sum of its proper divisors (138597710).

256464562 is a wasteful number, since it uses less digits than its factorization.

256464562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19233.

The product of its digits is 345600, while the sum is 40.

The square root of 256464562 is about 16014.5109822311. The cubic root of 256464562 is about 635.3442752543.

The spelling of 256464562 in words is "two hundred fifty-six million, four hundred sixty-four thousand, five hundred sixty-two".