13640552641 has 2 divisors, whose sum is σ = 13640552642. Its totient is φ = 13640552640.

The previous prime is 13640552621. The next prime is 13640552647. The reversal of 13640552641 is 14625504631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12968654400 + 671898241 = 113880^2 + 25921^2 .

It is a cyclic number.

It is not a de Polignac number, because 13640552641 - 2²¹ = 13638455489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13640552641.

It is not a weakly prime, because it can be changed into another prime (13640552647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6820276320 + 6820276321.

It is an arithmetic number, because the mean of its divisors is an integer number (6820276321).

Almost surely, 2^13640552641 is an apocalyptic number.

It is an amenable number.

13640552641 is a deficient number, since it is larger than the sum of its proper divisors (1).

13640552641 is an equidigital number, since it uses as much as digits as its factorization.

13640552641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 13640552641 in words is "thirteen billion, six hundred forty million, five hundred fifty-two thousand, six hundred forty-one".