135371253649 has 8 divisors (see below), whose sum is σ = 135806292072. Its totient is φ = 134936601600.

The previous prime is 135371253643. The next prime is 135371253671. The reversal of 135371253649 is 946352173531.

It can be written as a sum of positive squares in 4 ways, for example, as 1444532049 + 133926721600 = 38007^2 + 365960^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135371253649 - 2³⁵ = 101011515281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135371253643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613617 + ... + 804529.

It is an arithmetic number, because the mean of its divisors is an integer number (16975786509).

Almost surely, 2^135371253649 is an apocalyptic number.

It is an amenable number.

135371253649 is a deficient number, since it is larger than the sum of its proper divisors (435038423).

135371253649 is a wasteful number, since it uses less digits than its factorization.

135371253649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193187.

The product of its digits is 2041200, while the sum is 49.

The spelling of 135371253649 in words is "one hundred thirty-five billion, three hundred seventy-one million, two hundred fifty-three thousand, six hundred forty-nine".