6281312491 has 4 divisors (see below), whose sum is σ = 6281678592. Its totient is φ = 6280946392.

The previous prime is 6281312459. The next prime is 6281312501. The reversal of 6281312491 is 1942131826.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1942131826 = 2 ⋅971065913.

It is a cyclic number.

It is not a de Polignac number, because 6281312491 - 2⁵ = 6281312459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6281312491.

It is not an unprimeable number, because it can be changed into a prime (6281312441) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 155980 + ... + 192073.

It is an arithmetic number, because the mean of its divisors is an integer number (1570419648).

Almost surely, 2^6281312491 is an apocalyptic number.

6281312491 is a deficient number, since it is larger than the sum of its proper divisors (366101).

6281312491 is a wasteful number, since it uses less digits than its factorization.

6281312491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366100.

The product of its digits is 20736, while the sum is 37.

The square root of 6281312491 is about 79254.7316631632. The cubic root of 6281312491 is about 1845.0867917936.

The spelling of 6281312491 in words is "six billion, two hundred eighty-one million, three hundred twelve thousand, four hundred ninety-one".