819901768049 has 8 divisors (see below), whose sum is σ = 1009109868480. Its totient is φ = 648713486736.

The previous prime is 819901768033. The next prime is 819901768079. The reversal of 819901768049 is 940867109918.

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

It is not a de Polignac number, because 819901768049 - 2⁴ = 819901768033 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 819901767982 and 819901768000.

It is not an unprimeable number, because it can be changed into a prime (819901768009) 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, 4504954679 + ... + 4504954860.

It is an arithmetic number, because the mean of its divisors is an integer number (126138733560).

Almost surely, 2^819901768049 is an apocalyptic number.

It is an amenable number.

819901768049 is a deficient number, since it is larger than the sum of its proper divisors (189208100431).

819901768049 is a wasteful number, since it uses less digits than its factorization.

819901768049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9009909559.

The product of its (nonzero) digits is 7838208, while the sum is 62.

The spelling of 819901768049 in words is "eight hundred nineteen billion, nine hundred one million, seven hundred sixty-eight thousand, forty-nine".