1011016643 has 12 divisors (see below), whose sum is σ = 1251166608. Its totient is φ = 799924320.

The previous prime is 1011016637. The next prime is 1011016679. The reversal of 1011016643 is 3466101101.

1011016643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1011016643 - 2²⁸ = 742581187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011016693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 426128 + ... + 428493.

It is an arithmetic number, because the mean of its divisors is an integer number (104263884).

Almost surely, 2^1011016643 is an apocalyptic number.

1011016643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1011016643 is a deficient number, since it is larger than the sum of its proper divisors (240149965).

1011016643 is an equidigital number, since it uses as much as digits as its factorization.

1011016643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854654 (or 854641 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1011016643 is about 31796.4879035405. The cubic root of 1011016643 is about 1003.6588111079.

Adding to 1011016643 its reverse (3466101101), we get a palindrome (4477117744).

The spelling of 1011016643 in words is "one billion, eleven million, sixteen thousand, six hundred forty-three".