1255508000865 has 48 divisors (see below), whose sum is σ = 2221119705168. Its totient is φ = 655830908928.

The previous prime is 1255508000839. The next prime is 1255508000891. The reversal of 1255508000865 is 5680008055521.

1255508000865 is a `hidden beast` number, since 12 + 5 + 550 + 8 + 0 + 0 + 0 + 86 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1255508000839) and next prime (1255508000891).

It can be written as a sum of positive squares in 8 ways, for example, as 14955333264 + 1240552667601 = 122292^2 + 1113801^2 .

It is not a de Polignac number, because 1255508000865 - 2⁵ = 1255508000833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1255508000865.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 919977 + ... + 1832313.

It is an arithmetic number, because the mean of its divisors is an integer number (46273327191).

Almost surely, 2^{1255508000865} is an apocalyptic number.

1255508000865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1255508000865 is a deficient number, since it is larger than the sum of its proper divisors (965611704303).

1255508000865 is a wasteful number, since it uses less digits than its factorization.

1255508000865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912978 (or 912975 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 45.

The spelling of 1255508000865 in words is "one trillion, two hundred fifty-five billion, five hundred eight million, eight hundred sixty-five", and thus it is an aban number.