133545544615649 has 2 divisors, whose sum is σ = 133545544615650. Its totient is φ = 133545544615648.

The previous prime is 133545544615601. The next prime is 133545544615661. The reversal of 133545544615649 is 946516445545331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112788117030625 + 20757427585024 = 10620175^2 + 4556032^2 .

It is a cyclic number.

It is not a de Polignac number, because 133545544615649 - 2²⁸ = 133545276180193 is a prime.

It is not a weakly prime, because it can be changed into another prime (133545544615699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66772772307824 + 66772772307825.

It is an arithmetic number, because the mean of its divisors is an integer number (66772772307825).

Almost surely, 2^{133545544615649} is an apocalyptic number.

It is an amenable number.

133545544615649 is a deficient number, since it is larger than the sum of its proper divisors (1).

133545544615649 is an equidigital number, since it uses as much as digits as its factorization.

133545544615649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560000, while the sum is 65.

The spelling of 133545544615649 in words is "one hundred thirty-three trillion, five hundred forty-five billion, five hundred forty-four million, six hundred fifteen thousand, six hundred forty-nine".