255815561447 has 8 divisors (see below), whose sum is σ = 256140366480. Its totient is φ = 255490943680.

The previous prime is 255815561437. The next prime is 255815561459. The reversal of 255815561447 is 744165518552.

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-255815561447 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 (255815561437) 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, 2795504 + ... + 2885562.

It is an arithmetic number, because the mean of its divisors is an integer number (32017545810).

Almost surely, 2^255815561447 is an apocalyptic number.

255815561447 is a deficient number, since it is larger than the sum of its proper divisors (324805033).

255815561447 is a wasteful number, since it uses less digits than its factorization.

255815561447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93633.

The product of its digits is 6720000, while the sum is 53.

The spelling of 255815561447 in words is "two hundred fifty-five billion, eight hundred fifteen million, five hundred sixty-one thousand, four hundred forty-seven".