256734145452628 has 12 divisors (see below), whose sum is σ = 464777332285140. Its totient is φ = 123940621942592.

The previous prime is 256734145452619. The next prime is 256734145452679. The reversal of 256734145452628 is 826254541437652.

It can be written as a sum of positive squares in 2 ways, for example, as 176949269763984 + 79784875688644 = 13302228^2 + 8932238^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 256734145452628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106612695801 + ... + 1106612696032.

It is an arithmetic number, because the mean of its divisors is an integer number (38731444357095).

Almost surely, 2^{256734145452628} is an apocalyptic number.

It is an amenable number.

256734145452628 is a deficient number, since it is larger than the sum of its proper divisors (208043186832512).

256734145452628 is a wasteful number, since it uses less digits than its factorization.

256734145452628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213225391866 (or 2213225391864 counting only the distinct ones).

The product of its digits is 387072000, while the sum is 64.

The spelling of 256734145452628 in words is "two hundred fifty-six trillion, seven hundred thirty-four billion, one hundred forty-five million, four hundred fifty-two thousand, six hundred twenty-eight".