135816120901 has 2 divisors, whose sum is σ = 135816120902. Its totient is φ = 135816120900.

The previous prime is 135816120889. The next prime is 135816120919. The reversal of 135816120901 is 109021618531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90393429025 + 45422691876 = 300655^2 + 213126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135816120901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135816120931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67908060450 + 67908060451.

It is an arithmetic number, because the mean of its divisors is an integer number (67908060451).

Almost surely, 2^135816120901 is an apocalyptic number.

It is an amenable number.

135816120901 is a deficient number, since it is larger than the sum of its proper divisors (1).

135816120901 is an equidigital number, since it uses as much as digits as its factorization.

135816120901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 37.

The spelling of 135816120901 in words is "one hundred thirty-five billion, eight hundred sixteen million, one hundred twenty thousand, nine hundred one".