255667653509 has 8 divisors (see below), whose sum is σ = 259501472160. Its totient is φ = 251834360976.

The previous prime is 255667653499. The next prime is 255667653517. The reversal of 255667653509 is 905356766552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255667653509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255667653539) 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, 908882 + ... + 1156460.

It is an arithmetic number, because the mean of its divisors is an integer number (32437684020).

Almost surely, 2^255667653509 is an apocalyptic number.

It is an amenable number.

255667653509 is a deficient number, since it is larger than the sum of its proper divisors (3833818651).

255667653509 is a wasteful number, since it uses less digits than its factorization.

255667653509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263059.

The product of its (nonzero) digits is 51030000, while the sum is 59.

The spelling of 255667653509 in words is "two hundred fifty-five billion, six hundred sixty-seven million, six hundred fifty-three thousand, five hundred nine".