135413522021977 has 2 divisors, whose sum is σ = 135413522021978. Its totient is φ = 135413522021976.

The previous prime is 135413522021927. The next prime is 135413522022001. The reversal of 135413522021977 is 779120225314531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71008868408976 + 64404653613001 = 8426676^2 + 8025251^2 .

It is a cyclic number.

It is not a de Polignac number, because 135413522021977 - 2⁷ = 135413522021849 is a prime.

It is not a weakly prime, because it can be changed into another prime (135413522021917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67706761010988 + 67706761010989.

It is an arithmetic number, because the mean of its divisors is an integer number (67706761010989).

Almost surely, 2^{135413522021977} is an apocalyptic number.

It is an amenable number.

135413522021977 is a deficient number, since it is larger than the sum of its proper divisors (1).

135413522021977 is an equidigital number, since it uses as much as digits as its factorization.

135413522021977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 135413522021977 in words is "one hundred thirty-five trillion, four hundred thirteen billion, five hundred twenty-two million, twenty-one thousand, nine hundred seventy-seven".