2791816649 has 8 divisors (see below), whose sum is σ = 2888229960. Its totient is φ = 2696752000.

The previous prime is 2791816633. The next prime is 2791816663. The reversal of 2791816649 is 9466181972.

It can be written as a sum of positive squares in 4 ways, for example, as 291316624 + 2500500025 = 17068^2 + 50005^2 .

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 2791816649 - 2⁴ = 2791816633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2791816649.

It is not an unprimeable number, because it can be changed into a prime (2791816609) 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 7 ways as a sum of consecutive naturals, for example, 332954 + ... + 341235.

It is an arithmetic number, because the mean of its divisors is an integer number (361028745).

Almost surely, 2^2791816649 is an apocalyptic number.

It is an amenable number.

2791816649 is a deficient number, since it is larger than the sum of its proper divisors (96413311).

2791816649 is a wasteful number, since it uses less digits than its factorization.

2791816649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674331.

The product of its digits is 1306368, while the sum is 53.

The square root of 2791816649 is about 52837.6442415822. The cubic root of 2791816649 is about 1408.0852989455.

The spelling of 2791816649 in words is "two billion, seven hundred ninety-one million, eight hundred sixteen thousand, six hundred forty-nine".