255881749747 has 16 divisors (see below), whose sum is σ = 290151289120. Its totient is φ = 223703078400.

The previous prime is 255881749687. The next prime is 255881749811. The reversal of 255881749747 is 747947188552.

It is a cyclic number.

It is not a de Polignac number, because 255881749747 - 2⁷ = 255881749619 is a prime.

It is a super-3 number, since 3×255881749747³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (255881749247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 728347 + ... + 1020907.

It is an arithmetic number, because the mean of its divisors is an integer number (18134455570).

Almost surely, 2^255881749747 is an apocalyptic number.

255881749747 is a deficient number, since it is larger than the sum of its proper divisors (34269539373).

255881749747 is a wasteful number, since it uses less digits than its factorization.

255881749747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296134.

The product of its digits is 158054400, while the sum is 67.

The spelling of 255881749747 in words is "two hundred fifty-five billion, eight hundred eighty-one million, seven hundred forty-nine thousand, seven hundred forty-seven".