1255687028205 has 8 divisors (see below), whose sum is σ = 2009099245152. Its totient is φ = 669699748368.

The previous prime is 1255687028119. The next prime is 1255687028227. The reversal of 1255687028205 is 5028207865521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1255687028205 - 2²⁵ = 1255653473773 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41856234259 + ... + 41856234288.

It is an arithmetic number, because the mean of its divisors is an integer number (251137405644).

Almost surely, 2^{1255687028205} is an apocalyptic number.

1255687028205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1255687028205 is a deficient number, since it is larger than the sum of its proper divisors (753412216947).

1255687028205 is an equidigital number, since it uses as much as digits as its factorization.

1255687028205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83712468555.

The product of its (nonzero) digits is 2688000, while the sum is 51.

The spelling of 1255687028205 in words is "one trillion, two hundred fifty-five billion, six hundred eighty-seven million, twenty-eight thousand, two hundred five".