1255181680 has 20 divisors (see below), whose sum is σ = 2918297592. Its totient is φ = 502072640.

The previous prime is 1255181651. The next prime is 1255181701. The reversal of 1255181680 is 861815521.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7844806 + ... + 7844965.

Almost surely, 2^1255181680 is an apocalyptic number.

1255181680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255181680 is an abundant number, since it is smaller than the sum of its proper divisors (1663115912).

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

1255181680 is a wasteful number, since it uses less digits than its factorization.

1255181680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15689784 (or 15689778 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 37.

The square root of 1255181680 is about 35428.5432949197. The cubic root of 1255181680 is about 1078.7037718066.

The spelling of 1255181680 in words is "one billion, two hundred fifty-five million, one hundred eighty-one thousand, six hundred eighty".