135524621699 has 2 divisors, whose sum is σ = 135524621700. Its totient is φ = 135524621698.

The previous prime is 135524621651. The next prime is 135524621717. The reversal of 135524621699 is 996126425531.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135524621699 - 2²⁸ = 135256186243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135524621699.

It is not a weakly prime, because it can be changed into another prime (135524629699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67762310849 + 67762310850.

It is an arithmetic number, because the mean of its divisors is an integer number (67762310850).

Almost surely, 2^135524621699 is an apocalyptic number.

135524621699 is a deficient number, since it is larger than the sum of its proper divisors (1).

135524621699 is an equidigital number, since it uses as much as digits as its factorization.

135524621699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 53.

The spelling of 135524621699 in words is "one hundred thirty-five billion, five hundred twenty-four million, six hundred twenty-one thousand, six hundred ninety-nine".