255613557427 has 4 divisors (see below), whose sum is σ = 258485619960. Its totient is φ = 252741494896.

The previous prime is 255613557403. The next prime is 255613557449. The reversal of 255613557427 is 724755316552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255613557427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255613507427) 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, 1436031133 + ... + 1436031310.

It is an arithmetic number, because the mean of its divisors is an integer number (64621404990).

Almost surely, 2^255613557427 is an apocalyptic number.

255613557427 is a deficient number, since it is larger than the sum of its proper divisors (2872062533).

255613557427 is an equidigital number, since it uses as much as digits as its factorization.

255613557427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872062532.

The product of its digits is 8820000, while the sum is 52.

The spelling of 255613557427 in words is "two hundred fifty-five billion, six hundred thirteen million, five hundred fifty-seven thousand, four hundred twenty-seven".