1255333538378 has 4 divisors (see below), whose sum is σ = 1883000307570. Its totient is φ = 627666769188.

The previous prime is 1255333538323. The next prime is 1255333538399. The reversal of 1255333538378 is 8738353335521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1140844018609 + 114489519769 = 1068103^2 + 338363^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313833384593 + ... + 313833384596.

Almost surely, 2^{1255333538378} is an apocalyptic number.

1255333538378 is a deficient number, since it is larger than the sum of its proper divisors (627666769192).

1255333538378 is an equidigital number, since it uses as much as digits as its factorization.

1255333538378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627666769191.

The product of its digits is 27216000, while the sum is 56.

The spelling of 1255333538378 in words is "one trillion, two hundred fifty-five billion, three hundred thirty-three million, five hundred thirty-eight thousand, three hundred seventy-eight".