2638232881 has 2 divisors, whose sum is σ = 2638232882. Its totient is φ = 2638232880.

The previous prime is 2638232827. The next prime is 2638232899. The reversal of 2638232881 is 1882328362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2008473856 + 629759025 = 44816^2 + 25095^2 .

It is a cyclic number.

It is not a de Polignac number, because 2638232881 - 2⁹ = 2638232369 is a prime.

It is a super-2 number, since 2×2638232881² = 13920545468779120322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2638232581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319116440 + 1319116441.

It is an arithmetic number, because the mean of its divisors is an integer number (1319116441).

Almost surely, 2^2638232881 is an apocalyptic number.

It is an amenable number.

2638232881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638232881 is an equidigital number, since it uses as much as digits as its factorization.

2638232881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 43.

The square root of 2638232881 is about 51363.7311826156. The cubic root of 2638232881 is about 1381.7762049453.

The spelling of 2638232881 in words is "two billion, six hundred thirty-eight million, two hundred thirty-two thousand, eight hundred eighty-one".