36642505121 has 2 divisors, whose sum is σ = 36642505122. Its totient is φ = 36642505120.

The previous prime is 36642505099. The next prime is 36642505187. The reversal of 36642505121 is 12150524663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35564302225 + 1078202896 = 188585^2 + 32836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36642505121 is a prime.

It is a super-2 number, since 2×36642505121² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (36642505321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18321252560 + 18321252561.

It is an arithmetic number, because the mean of its divisors is an integer number (18321252561).

Almost surely, 2^36642505121 is an apocalyptic number.

It is an amenable number.

36642505121 is a deficient number, since it is larger than the sum of its proper divisors (1).

36642505121 is an equidigital number, since it uses as much as digits as its factorization.

36642505121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 36642505121 in words is "thirty-six billion, six hundred forty-two million, five hundred five thousand, one hundred twenty-one".