2536718981 has 2 divisors, whose sum is σ = 2536718982. Its totient is φ = 2536718980.

The previous prime is 2536718963. The next prime is 2536719011. The reversal of 2536718981 is 1898176352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1853733025 + 682985956 = 43055^2 + 26134^2 .

It is a cyclic number.

It is not a de Polignac number, because 2536718981 - 2²² = 2532524677 is a prime.

It is a super-2 number, since 2×2536718981² = 12869886377131356722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2536718911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1268359490 + 1268359491.

It is an arithmetic number, because the mean of its divisors is an integer number (1268359491).

Almost surely, 2^2536718981 is an apocalyptic number.

It is an amenable number.

2536718981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2536718981 is an equidigital number, since it uses as much as digits as its factorization.

2536718981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 50.

The square root of 2536718981 is about 50365.8513379849. The cubic root of 2536718981 is about 1363.8212495054.

The spelling of 2536718981 in words is "two billion, five hundred thirty-six million, seven hundred eighteen thousand, nine hundred eighty-one".