2798115981049 has 9 divisors (see below), whose sum is σ = 2806742070093. Its totient is φ = 2789516337312.

The previous prime is 2798115981029. The next prime is 2798115981131. The reversal of 2798115981049 is 9401895118972.

The square root of 2798115981049 is 1672757.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1027800578025 + 1770315403024 = 1013805^2 + 1330532^2 .

It is not a de Polignac number, because 2798115981049 - 2⁹ = 2798115980537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2798115981029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 583789797 + ... + 583794589.

Almost surely, 2^{2798115981049} is an apocalyptic number.

2798115981049 is the 1672757-th square number.

2798115981049 is the 836379-th centered octagonal number.

It is an amenable number.

2798115981049 is a deficient number, since it is larger than the sum of its proper divisors (8626089044).

2798115981049 is an frugal number, since it uses more digits than its factorization.

2798115981049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10284 (or 5142 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 64.

Multiplying 2798115981049 by its sum of digits (64), we get a square (179079422787136 = 13382056²).

The spelling of 2798115981049 in words is "two trillion, seven hundred ninety-eight billion, one hundred fifteen million, nine hundred eighty-one thousand, forty-nine".