2636725600021 has 2 divisors, whose sum is σ = 2636725600022. Its totient is φ = 2636725600020.

The previous prime is 2636725600009. The next prime is 2636725600051. The reversal of 2636725600021 is 1200065276362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2616451827025 + 20273772996 = 1617545^2 + 142386^2 .

It is a cyclic number.

It is not a de Polignac number, because 2636725600021 - 2⁹ = 2636725599509 is a prime.

It is a super-2 number, since 2×2636725600021² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2636725600051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1318362800010 + 1318362800011.

It is an arithmetic number, because the mean of its divisors is an integer number (1318362800011).

Almost surely, 2^{2636725600021} is an apocalyptic number.

It is an amenable number.

2636725600021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2636725600021 is an equidigital number, since it uses as much as digits as its factorization.

2636725600021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 2636725600021 in words is "two trillion, six hundred thirty-six billion, seven hundred twenty-five million, six hundred thousand, twenty-one".