312256880891 has 4 divisors (see below), whose sum is σ = 312282757032. Its totient is φ = 312231004752.

The previous prime is 312256880869. The next prime is 312256880893. The reversal of 312256880891 is 198088652213.

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

It is a cyclic number.

It is not a de Polignac number, because 312256880891 - 2¹⁸ = 312256618747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312256880893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12919961 + ... + 12944106.

It is an arithmetic number, because the mean of its divisors is an integer number (78070689258).

Almost surely, 2^312256880891 is an apocalyptic number.

312256880891 is a deficient number, since it is larger than the sum of its proper divisors (25876141).

312256880891 is a wasteful number, since it uses less digits than its factorization.

312256880891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25876140.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 312256880891 in words is "three hundred twelve billion, two hundred fifty-six million, eight hundred eighty thousand, eight hundred ninety-one".