1016780779 has 8 divisors (see below), whose sum is σ = 1183960800. Its totient is φ = 855082176.

The previous prime is 1016780773. The next prime is 1016780789. The reversal of 1016780779 is 9770876101.

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 1016780779 - 2⁷ = 1016780651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1016780773) 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, 1369954 + ... + 1370695.

It is an arithmetic number, because the mean of its divisors is an integer number (147995100).

Almost surely, 2^1016780779 is an apocalyptic number.

1016780779 is a deficient number, since it is larger than the sum of its proper divisors (167180021).

1016780779 is an equidigital number, since it uses as much as digits as its factorization.

1016780779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740709.

The product of its (nonzero) digits is 148176, while the sum is 46.

The square root of 1016780779 is about 31887.0001568037. Note that the first 3 decimals coincide. The cubic root of 1016780779 is about 1005.5625931837.

The spelling of 1016780779 in words is "one billion, sixteen million, seven hundred eighty thousand, seven hundred seventy-nine".