2649019813 has 8 divisors (see below), whose sum is σ = 2891097216. Its totient is φ = 2407152000.

The previous prime is 2649019787. The next prime is 2649019829. The reversal of 2649019813 is 3189109462.

It is a happy number.

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

It is not a de Polignac number, because 2649019813 - 2¹⁷ = 2648888741 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 2649019813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649019853) 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, 25356 + ... + 77077.

It is an arithmetic number, because the mean of its divisors is an integer number (361387152).

Almost surely, 2^2649019813 is an apocalyptic number.

It is an amenable number.

2649019813 is a deficient number, since it is larger than the sum of its proper divisors (242077403).

2649019813 is a wasteful number, since it uses less digits than its factorization.

2649019813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104795.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 2649019813 is about 51468.6294066590. The cubic root of 2649019813 is about 1383.6568650280.

The spelling of 2649019813 in words is "two billion, six hundred forty-nine million, nineteen thousand, eight hundred thirteen".