2491027678 has 4 divisors (see below), whose sum is σ = 3736541520. Its totient is φ = 1245513838.

The previous prime is 2491027633. The next prime is 2491027727. The reversal of 2491027678 is 8767201942.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622756918 + ... + 622756921.

It is an arithmetic number, because the mean of its divisors is an integer number (934135380).

Almost surely, 2^2491027678 is an apocalyptic number.

2491027678 is a deficient number, since it is larger than the sum of its proper divisors (1245513842).

2491027678 is a wasteful number, since it uses less digits than its factorization.

2491027678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245513841.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 2491027678 is about 49910.1961326541. The cubic root of 2491027678 is about 1355.5832201104.

The spelling of 2491027678 in words is "two billion, four hundred ninety-one million, twenty-seven thousand, six hundred seventy-eight".