255765597739 has 4 divisors (see below), whose sum is σ = 255842801656. Its totient is φ = 255688393824.

The previous prime is 255765597713. The next prime is 255765597749. The reversal of 255765597739 is 937795567552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255765597739 - 2³¹ = 253618114091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255765597749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38596989 + ... + 38603614.

It is an arithmetic number, because the mean of its divisors is an integer number (63960700414).

Almost surely, 2^255765597739 is an apocalyptic number.

255765597739 is a deficient number, since it is larger than the sum of its proper divisors (77203917).

255765597739 is an equidigital number, since it uses as much as digits as its factorization.

255765597739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77203916.

The product of its digits is 625117500, while the sum is 70.

The spelling of 255765597739 in words is "two hundred fifty-five billion, seven hundred sixty-five million, five hundred ninety-seven thousand, seven hundred thirty-nine".