2632801681 has 4 divisors (see below), whose sum is σ = 2642171364. Its totient is φ = 2623432000.

The previous prime is 2632801673. The next prime is 2632801727. The reversal of 2632801681 is 1861082362.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2099930625 + 532871056 = 45825^2 + 23084^2 .

It is a cyclic number.

It is not a de Polignac number, because 2632801681 - 2³ = 2632801673 is a prime.

It is a super-2 number, since 2×2632801681² = 13863289382952851522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2632801681.

It is not an unprimeable number, because it can be changed into a prime (2632801981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4684420 + ... + 4684981.

It is an arithmetic number, because the mean of its divisors is an integer number (660542841).

Almost surely, 2^2632801681 is an apocalyptic number.

It is an amenable number.

2632801681 is a deficient number, since it is larger than the sum of its proper divisors (9369683).

2632801681 is an equidigital number, since it uses as much as digits as its factorization.

2632801681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9369682.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 2632801681 is about 51310.8339534644. The cubic root of 2632801681 is about 1380.8273553409.

The spelling of 2632801681 in words is "two billion, six hundred thirty-two million, eight hundred one thousand, six hundred eighty-one".