2491668047 has 8 divisors (see below), whose sum is σ = 2755419600. Its totient is φ = 2234122560.

The previous prime is 2491667989. The next prime is 2491668061. The reversal of 2491668047 is 7408661942.

2491668047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2491668047 - 2¹⁰ = 2491667023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2491667992 and 2491668010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491668247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1550672 + ... + 1552277.

It is an arithmetic number, because the mean of its divisors is an integer number (344427450).

Almost surely, 2^2491668047 is an apocalyptic number.

2491668047 is a deficient number, since it is larger than the sum of its proper divisors (263751553).

2491668047 is a wasteful number, since it uses less digits than its factorization.

2491668047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3103033.

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 2491668047 is about 49916.6109326344. The cubic root of 2491668047 is about 1355.6993701775.

The spelling of 2491668047 in words is "two billion, four hundred ninety-one million, six hundred sixty-eight thousand, forty-seven".