256622440405570 has 16 divisors (see below), whose sum is σ = 469749551929920. Its totient is φ = 100909163006704.

The previous prime is 256622440405519. The next prime is 256622440405577. The reversal of 256622440405570 is 75504044226652.

It is a super-2 number, since 2×256622440405570² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256622440405577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217476643822 + ... + 217476645001.

It is an arithmetic number, because the mean of its divisors is an integer number (29359346995620).

Almost surely, 2^{256622440405570} is an apocalyptic number.

256622440405570 is a deficient number, since it is larger than the sum of its proper divisors (213127111524350).

256622440405570 is a wasteful number, since it uses less digits than its factorization.

256622440405570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434953288889.

The product of its (nonzero) digits is 16128000, while the sum is 52.

The spelling of 256622440405570 in words is "two hundred fifty-six trillion, six hundred twenty-two billion, four hundred forty million, four hundred five thousand, five hundred seventy".