1016638799 has 8 divisors (see below), whose sum is σ = 1111699920. Its totient is φ = 922017600.

The previous prime is 1016638783. The next prime is 1016638813. The reversal of 1016638799 is 9978366101.

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 1016638799 - 2⁴ = 1016638783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1016638759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105134 + ... + 114395.

It is an arithmetic number, because the mean of its divisors is an integer number (138962490).

Almost surely, 2^1016638799 is an apocalyptic number.

1016638799 is a deficient number, since it is larger than the sum of its proper divisors (95061121).

1016638799 is a wasteful number, since it uses less digits than its factorization.

1016638799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219961.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 1016638799 is about 31884.7737799722. The cubic root of 1016638799 is about 1005.5157864954.

The spelling of 1016638799 in words is "one billion, sixteen million, six hundred thirty-eight thousand, seven hundred ninety-nine".