256741115690 has 16 divisors (see below), whose sum is σ = 489318361992. Its totient is φ = 96655478784.

The previous prime is 256741115677. The next prime is 256741115699. The reversal of 256741115690 is 96511147652.

It can be written as a sum of positive squares in 4 ways, for example, as 181937224681 + 74803891009 = 426541^2 + 273503^2 .

It is a super-2 number, since 2×256741115690² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256741115699) 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, 755120759 + ... + 755121098.

Almost surely, 2^256741115690 is an apocalyptic number.

256741115690 is a deficient number, since it is larger than the sum of its proper divisors (232577246302).

256741115690 is a wasteful number, since it uses less digits than its factorization.

256741115690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510241881.

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 256741115690 in words is "two hundred fifty-six billion, seven hundred forty-one million, one hundred fifteen thousand, six hundred ninety".