135687711976 has 16 divisors (see below), whose sum is σ = 254420534340. Its totient is φ = 67842236160.

The previous prime is 135687711959. The next prime is 135687712021. The reversal of 135687711976 is 679117786531.

It can be written as a sum of positive squares in 2 ways, for example, as 133316995876 + 2370716100 = 365126^2 + 48690^2 .

It is a super-2 number, since 2×135687711976² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200770 + ... + 558286.

Almost surely, 2^135687711976 is an apocalyptic number.

It is an amenable number.

135687711976 is a deficient number, since it is larger than the sum of its proper divisors (118732822364).

135687711976 is a wasteful number, since it uses less digits than its factorization.

135687711976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404964 (or 404960 counting only the distinct ones).

The product of its digits is 13335840, while the sum is 61.

The spelling of 135687711976 in words is "one hundred thirty-five billion, six hundred eighty-seven million, seven hundred eleven thousand, nine hundred seventy-six".