255564388757 has 4 divisors (see below), whose sum is σ = 269015146080. Its totient is φ = 242113631436.

The previous prime is 255564388699. The next prime is 255564388813. The reversal of 255564388757 is 757883465552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255564388757 - 2⁸ = 255564388501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255564388693 and 255564388702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255564088757) 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, 6725378633 + ... + 6725378670.

It is an arithmetic number, because the mean of its divisors is an integer number (67253786520).

Almost surely, 2^255564388757 is an apocalyptic number.

It is an amenable number.

255564388757 is a deficient number, since it is larger than the sum of its proper divisors (13450757323).

255564388757 is a wasteful number, since it uses less digits than its factorization.

255564388757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13450757322.

The product of its digits is 282240000, while the sum is 65.

The spelling of 255564388757 in words is "two hundred fifty-five billion, five hundred sixty-four million, three hundred eighty-eight thousand, seven hundred fifty-seven".