255815561448 has 48 divisors (see below), whose sum is σ = 718494329280. Its totient is φ = 85271853168.

The previous prime is 255815561437. The next prime is 255815561459. The reversal of 255815561448 is 844165518552.

It is a happy number.

255815561448 is a `hidden beast` number, since 2 + 5 + 5 + 8 + 15 + 5 + 614 + 4 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (255815561437) and next prime (255815561459).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 255815561394 and 255815561403.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65794240 + ... + 65798127.

It is an arithmetic number, because the mean of its divisors is an integer number (14968631860).

Almost surely, 2^255815561448 is an apocalyptic number.

It is an amenable number.

255815561448 is an abundant number, since it is smaller than the sum of its proper divisors (462678767832).

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

255815561448 is a wasteful number, since it uses less digits than its factorization.

255815561448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131592388 (or 131592372 counting only the distinct ones).

The product of its digits is 7680000, while the sum is 54.

The spelling of 255815561448 in words is "two hundred fifty-five billion, eight hundred fifteen million, five hundred sixty-one thousand, four hundred forty-eight".