255740644 has 6 divisors (see below), whose sum is σ = 447546134. Its totient is φ = 127870320.

The previous prime is 255740623. The next prime is 255740663. The reversal of 255740644 is 446047552.

It can be written as a sum of positive squares in only one way, i.e., 146119744 + 109620900 = 12088^2 + 10470^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31967577 + ... + 31967584.

Almost surely, 2^255740644 is an apocalyptic number.

It is an amenable number.

255740644 is a deficient number, since it is larger than the sum of its proper divisors (191805490).

255740644 is a wasteful number, since it uses less digits than its factorization.

255740644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63935165 (or 63935163 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 37.

The square root of 255740644 is about 15991.8930711783. The cubic root of 255740644 is about 634.7459202151.

The spelling of 255740644 in words is "two hundred fifty-five million, seven hundred forty thousand, six hundred forty-four".