2798515801 has 3 divisors (see below), whose sum is σ = 2798568703. Its totient is φ = 2798462900.

The previous prime is 2798515799. The next prime is 2798515807. The reversal of 2798515801 is 1085158972.

The square root of 2798515801 is 52901.

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 can be written as a sum of positive squares in only one way, i.e., 2798304201 + 211600 = 52899^2 + 460^2 .

It is not a de Polignac number, because 2798515801 - 2¹ = 2798515799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2798515807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 26451 + ... + 79351.

Almost surely, 2^2798515801 is an apocalyptic number.

2798515801 is the 52901-st square number.

2798515801 is the 26451-st centered octagonal number.

It is an amenable number.

2798515801 is a deficient number, since it is larger than the sum of its proper divisors (52902).

2798515801 is an frugal number, since it uses more digits than its factorization.

2798515801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105802 (or 52901 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 46.

The cubic root of 2798515801 is about 1409.2106644514.

The spelling of 2798515801 in words is "two billion, seven hundred ninety-eight million, five hundred fifteen thousand, eight hundred one".