2632818721 has 9 divisors (see below), whose sum is σ = 2851644531. Its totient is φ = 2429678472.

The previous prime is 2632818709. The next prime is 2632818751. The reversal of 2632818721 is 1278182362.

It is a happy number.

The square root of 2632818721 is 51311.

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

It can be written as a sum of positive squares in only one way, i.e., 389470225 + 2243348496 = 19735^2 + 47364^2 .

It is not a de Polignac number, because 2632818721 - 2²³ = 2624430113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2632818751) 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, 665070 + ... + 669016.

Almost surely, 2^2632818721 is an apocalyptic number.

2632818721 is the 51311-st square number.

2632818721 is the 25656-th centered octagonal number.

It is an amenable number.

2632818721 is a deficient number, since it is larger than the sum of its proper divisors (218825810).

2632818721 is an frugal number, since it uses more digits than its factorization.

2632818721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7920 (or 3960 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The cubic root of 2632818721 is about 1380.8303343281.

The spelling of 2632818721 in words is "two billion, six hundred thirty-two million, eight hundred eighteen thousand, seven hundred twenty-one".