255652287690 has 64 divisors (see below), whose sum is σ = 633878618112. Its totient is φ = 65920545600.

The previous prime is 255652287679. The next prime is 255652287731. The reversal of 255652287690 is 96782256552.

It is a super-2 number, since 2×255652287690² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 255652287690.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1025005 + ... + 1249775.

It is an arithmetic number, because the mean of its divisors is an integer number (9904353408).

Almost surely, 2^255652287690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255652287690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316939309056).

255652287690 is an abundant number, since it is smaller than the sum of its proper divisors (378226330422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255652287690 is a wasteful number, since it uses less digits than its factorization.

255652287690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226035.

The product of its (nonzero) digits is 18144000, while the sum is 57.

The spelling of 255652287690 in words is "two hundred fifty-five billion, six hundred fifty-two million, two hundred eighty-seven thousand, six hundred ninety".