1255590955521 has 32 divisors (see below), whose sum is σ = 2152778035200. Its totient is φ = 708398505360.

The previous prime is 1255590955499. The next prime is 1255590955543.

1255590955521 is a `hidden beast` number, since 1 + 25 + 5 + 5 + 9 + 0 + 95 + 5 + 521 = 666.

1255590955521 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1255590955499) and next prime (1255590955543).

It is a de Polignac number, because none of the positive numbers 2^k-1255590955521 is a prime.

It is a super-2 number, since 2×1255590955521² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1255590957521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42031515 + ... + 42061376.

It is an arithmetic number, because the mean of its divisors is an integer number (67274313600).

Almost surely, 2^{1255590955521} is an apocalyptic number.

It is an amenable number.

1255590955521 is a deficient number, since it is larger than the sum of its proper divisors (897187079679).

1255590955521 is an equidigital number, since it uses as much as digits as its factorization.

1255590955521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84092986 (or 84092980 counting only the distinct ones).

The product of its (nonzero) digits is 5062500, while the sum is 54.

The spelling of 1255590955521 in words is "one trillion, two hundred fifty-five billion, five hundred ninety million, nine hundred fifty-five thousand, five hundred twenty-one".