819864051 has 8 divisors (see below), whose sum is σ = 1108548864. Its totient is φ = 538877640.

The previous prime is 819864011. The next prime is 819864053. The reversal of 819864051 is 150468918.

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

It is not a de Polignac number, because 819864051 - 2⁶ = 819863987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 819863994 and 819864012.

It is not an unprimeable number, because it can be changed into a prime (819864053) 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, 1924351 + ... + 1924776.

It is an arithmetic number, because the mean of its divisors is an integer number (138568608).

Almost surely, 2^819864051 is an apocalyptic number.

819864051 is a deficient number, since it is larger than the sum of its proper divisors (288684813).

819864051 is a wasteful number, since it uses less digits than its factorization.

819864051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849201.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 819864051 is about 28633.2682556498. The cubic root of 819864051 is about 935.9384330623.

The spelling of 819864051 in words is "eight hundred nineteen million, eight hundred sixty-four thousand, fifty-one".