6281254649 has 4 divisors (see below), whose sum is σ = 6282891264. Its totient is φ = 6279618036.

The previous prime is 6281254633. The next prime is 6281254657. The reversal of 6281254649 is 9464521826.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6281254649 - 2⁴ = 6281254633 is a prime.

It is a super-2 number, since 2×6281254649² = 78908319931168226402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6281254619) 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, 812537 + ... + 820230.

It is an arithmetic number, because the mean of its divisors is an integer number (1570722816).

Almost surely, 2^6281254649 is an apocalyptic number.

It is an amenable number.

6281254649 is a deficient number, since it is larger than the sum of its proper divisors (1636615).

6281254649 is a wasteful number, since it uses less digits than its factorization.

6281254649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636614.

The product of its digits is 829440, while the sum is 47.

The square root of 6281254649 is about 79254.3667503564. The cubic root of 6281254649 is about 1845.0811282300.

The spelling of 6281254649 in words is "six billion, two hundred eighty-one million, two hundred fifty-four thousand, six hundred forty-nine".