2491780694 has 8 divisors (see below), whose sum is σ = 4025184240. Its totient is φ = 1150052616.

The previous prime is 2491780691. The next prime is 2491780723. The reversal of 2491780694 is 4960871942.

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

It is a super-2 number, since 2×2491780694² = 12417942053982243272, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491780691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47918834 + ... + 47918885.

It is an arithmetic number, because the mean of its divisors is an integer number (503148030).

Almost surely, 2^2491780694 is an apocalyptic number.

2491780694 is a deficient number, since it is larger than the sum of its proper divisors (1533403546).

2491780694 is a wasteful number, since it uses less digits than its factorization.

2491780694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95837734.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 2491780694 is about 49917.7392717258. The cubic root of 2491780694 is about 1355.7198000212.

The spelling of 2491780694 in words is "two billion, four hundred ninety-one million, seven hundred eighty thousand, six hundred ninety-four".