2680432991 has 2 divisors, whose sum is σ = 2680432992. Its totient is φ = 2680432990.

The previous prime is 2680432981. The next prime is 2680433009. The reversal of 2680432991 is 1992340862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2680432991 - 2⁶ = 2680432927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2680432981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340216495 + 1340216496.

It is an arithmetic number, because the mean of its divisors is an integer number (1340216496).

Almost surely, 2^2680432991 is an apocalyptic number.

2680432991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2680432991 is an equidigital number, since it uses as much as digits as its factorization.

2680432991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 2680432991 is about 51772.8982287065. The cubic root of 2680432991 is about 1389.1047132313.

It can be divided in two parts, 26804 and 32991, that added together give a palindrome (59795).

The spelling of 2680432991 in words is "two billion, six hundred eighty million, four hundred thirty-two thousand, nine hundred ninety-one".