2491778294 has 8 divisors (see below), whose sum is σ = 3934386840. Its totient is φ = 1180316016.

The previous prime is 2491778287. The next prime is 2491778309. The reversal of 2491778294 is 4928771942.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32786519 + ... + 32786594.

It is an arithmetic number, because the mean of its divisors is an integer number (491798355).

Almost surely, 2^2491778294 is an apocalyptic number.

2491778294 is a deficient number, since it is larger than the sum of its proper divisors (1442608546).

2491778294 is a wasteful number, since it uses less digits than its factorization.

2491778294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65573134.

The product of its digits is 2032128, while the sum is 53.

The square root of 2491778294 is about 49917.7152321698. The cubic root of 2491778294 is about 1355.7193647597.

The spelling of 2491778294 in words is "two billion, four hundred ninety-one million, seven hundred seventy-eight thousand, two hundred ninety-four".