255609398995 has 8 divisors (see below), whose sum is σ = 315021313584. Its totient is φ = 198960829344.

The previous prime is 255609398977. The next prime is 255609398999. The reversal of 255609398995 is 599893906552.

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

It is not a de Polignac number, because 255609398995 - 2⁷ = 255609398867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255609398999) 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, 690836029 + ... + 690836398.

It is an arithmetic number, because the mean of its divisors is an integer number (39377664198).

Almost surely, 2^255609398995 is an apocalyptic number.

255609398995 is a deficient number, since it is larger than the sum of its proper divisors (59411914589).

255609398995 is a wasteful number, since it uses less digits than its factorization.

255609398995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381672469.

The product of its (nonzero) digits is 236196000, while the sum is 70.

The spelling of 255609398995 in words is "two hundred fifty-five billion, six hundred nine million, three hundred ninety-eight thousand, nine hundred ninety-five".