135522641956 has 27 divisors (see below), whose sum is σ = 256829535921. Its totient is φ = 62544494064.

The previous prime is 135522641953. The next prime is 135522641981. The reversal of 135522641956 is 659146225531.

It is a happy number.

The square root of 135522641956 is 368134.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 20047728100 + 115474913856 = 141590^2 + 339816^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135522641953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9564405 + ... + 9578563.

Almost surely, 2^135522641956 is an apocalyptic number.

135522641956 is the 368134-th square number.

It is an amenable number.

135522641956 is a deficient number, since it is larger than the sum of its proper divisors (121306893965).

135522641956 is an frugal number, since it uses more digits than its factorization.

135522641956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28348 (or 14174 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 49.

Multiplying 135522641956 by its sum of digits (49), we get a square (6640609455844 = 2576938²).

The spelling of 135522641956 in words is "one hundred thirty-five billion, five hundred twenty-two million, six hundred forty-one thousand, nine hundred fifty-six".