13538099761 has 2 divisors, whose sum is σ = 13538099762. Its totient is φ = 13538099760.

The previous prime is 13538099741. The next prime is 13538099789. The reversal of 13538099761 is 16799083531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12239218161 + 1298881600 = 110631^2 + 36040^2 .

It is a cyclic number.

It is not a de Polignac number, because 13538099761 - 2²¹ = 13536002609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13538099699 and 13538099708.

It is not a weakly prime, because it can be changed into another prime (13538099741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6769049880 + 6769049881.

It is an arithmetic number, because the mean of its divisors is an integer number (6769049881).

Almost surely, 2^13538099761 is an apocalyptic number.

It is an amenable number.

13538099761 is a deficient number, since it is larger than the sum of its proper divisors (1).

13538099761 is an equidigital number, since it uses as much as digits as its factorization.

13538099761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 13538099761 in words is "thirteen billion, five hundred thirty-eight million, ninety-nine thousand, seven hundred sixty-one".