1019782884649 has 3 divisors (see below), whose sum is σ = 1019783894493. Its totient is φ = 1019781874806.

The previous prime is 1019782884607. The next prime is 1019782884689. The reversal of 1019782884649 is 9464882879101.

The square root of 1019782884649 is 1009843.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1019782884649 - 2¹³ = 1019782876457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1019782884689) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 504922 + ... + 1514764.

It is an arithmetic number, because the mean of its divisors is an integer number (339927964831).

Almost surely, 2^{1019782884649} is an apocalyptic number.

1019782884649 is the 1009843-rd square number.

1019782884649 is the 504922-nd centered octagonal number.

It is an amenable number.

1019782884649 is a deficient number, since it is larger than the sum of its proper divisors (1009844).

1019782884649 is an frugal number, since it uses more digits than its factorization.

1019782884649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019686 (or 1009843 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 67.

The spelling of 1019782884649 in words is "one trillion, nineteen billion, seven hundred eighty-two million, eight hundred eighty-four thousand, six hundred forty-nine".