2879167569721 has 3 divisors (see below), whose sum is σ = 2879169266533. Its totient is φ = 2879165872910.

The previous prime is 2879167569713. The next prime is 2879167569739. The reversal of 2879167569721 is 1279657619782.

The square root of 2879167569721 is 1696811.

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 2879167569721 - 2³ = 2879167569713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2879167569781) 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, 848406 + ... + 2545216.

Almost surely, 2^{2879167569721} is an apocalyptic number.

2879167569721 is the 1696811-st square number.

2879167569721 is the 848406-th centered octagonal number.

It is an amenable number.

2879167569721 is a deficient number, since it is larger than the sum of its proper divisors (1696812).

2879167569721 is an frugal number, since it uses more digits than its factorization.

2879167569721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393622 (or 1696811 counting only the distinct ones).

The product of its digits is 160030080, while the sum is 70.

The spelling of 2879167569721 in words is "two trillion, eight hundred seventy-nine billion, one hundred sixty-seven million, five hundred sixty-nine thousand, seven hundred twenty-one".