2135726651 has 2 divisors, whose sum is σ = 2135726652. Its totient is φ = 2135726650.

The previous prime is 2135726641. The next prime is 2135726653. The reversal of 2135726651 is 1566275312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2135726651 - 2³⁰ = 1061984827 is a prime.

It is a super-2 number, since 2×2135726651² = 9122656655583351602, which contains 22 as substring.

Together with 2135726653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2135726653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067863325 + 1067863326.

It is an arithmetic number, because the mean of its divisors is an integer number (1067863326).

Almost surely, 2^2135726651 is an apocalyptic number.

2135726651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135726651 is an equidigital number, since it uses as much as digits as its factorization.

2135726651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 2135726651 is about 46213.9226965208. The cubic root of 2135726651 is about 1287.8004001473.

The spelling of 2135726651 in words is "two billion, one hundred thirty-five million, seven hundred twenty-six thousand, six hundred fifty-one".