1255205655 has 48 divisors (see below), whose sum is σ = 2450073600. Its totient is φ = 588945600.

The previous prime is 1255205639. The next prime is 1255205681. The reversal of 1255205655 is 5565025521.

1255205655 is a `hidden beast` number, since 1 + 2 + 552 + 0 + 56 + 55 = 666.

1255205655 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1255205655 - 2⁴ = 1255205639 is a prime.

It is a congruent number.

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, 25555 + ... + 56244.

It is an arithmetic number, because the mean of its divisors is an integer number (51043200).

Almost surely, 2^1255205655 is an apocalyptic number.

1255205655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1255205655 is a deficient number, since it is larger than the sum of its proper divisors (1194867945).

1255205655 is a wasteful number, since it uses less digits than its factorization.

1255205655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81852 (or 81849 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The square root of 1255205655 is about 35428.8816504275. The cubic root of 1255205655 is about 1078.7106398052.

The spelling of 1255205655 in words is "one billion, two hundred fifty-five million, two hundred five thousand, six hundred fifty-five".