2489821567 has 6 divisors (see below), whose sum is σ = 2531311224. Its totient is φ = 2449001160.

The previous prime is 2489821559. The next prime is 2489821589. The reversal of 2489821567 is 7651289842.

It is not a de Polignac number, because 2489821567 - 2³ = 2489821559 is a prime.

It is a super-2 number, since 2×2489821567² = 12398422870996670978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2489824567) 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 5 ways as a sum of consecutive naturals, for example, 330843 + ... + 338284.

It is an arithmetic number, because the mean of its divisors is an integer number (421885204).

Almost surely, 2^2489821567 is an apocalyptic number.

2489821567 is a deficient number, since it is larger than the sum of its proper divisors (41489657).

2489821567 is an frugal number, since it uses more digits than its factorization.

2489821567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669249 (or 669188 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 52.

The square root of 2489821567 is about 49898.1118580653. Note that the first 3 decimals coincide. The cubic root of 2489821567 is about 1355.3644017494.

The spelling of 2489821567 in words is "two billion, four hundred eighty-nine million, eight hundred twenty-one thousand, five hundred sixty-seven".