2680510981 has 2 divisors, whose sum is σ = 2680510982. Its totient is φ = 2680510980.

The previous prime is 2680510969. The next prime is 2680511021. The reversal of 2680510981 is 1890150862.

2680510981 = 36609² + 36610².

2680510981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (2680511021) can be obtained adding 2680510981 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1340292100 + 1340218881 = 36610^2 + 36609^2 .

It is a cyclic number.

It is not a de Polignac number, because 2680510981 - 2⁵ = 2680510949 is a prime.

It is a super-2 number, since 2×2680510981² = 14370278238523164722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2680510961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340255490 + 1340255491.

It is an arithmetic number, because the mean of its divisors is an integer number (1340255491).

Almost surely, 2^2680510981 is an apocalyptic number.

2680510981 is the 36610-th centered square number.

It is an amenable number.

2680510981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2680510981 is an equidigital number, since it uses as much as digits as its factorization.

2680510981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 2680510981 is about 51773.6514165265. The cubic root of 2680510981 is about 1389.1181855852.

The spelling of 2680510981 in words is "two billion, six hundred eighty million, five hundred ten thousand, nine hundred eighty-one".