135661512 has 32 divisors (see below), whose sum is σ = 387604800. Its totient is φ = 38760384.

The previous prime is 135661481. The next prime is 135661523. The reversal of 135661512 is 215166531.

It is a super-2 number, since 2×135661512² = 36808091676252288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 135661512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403587 + ... + 403922.

It is an arithmetic number, because the mean of its divisors is an integer number (12112650).

Almost surely, 2^135661512 is an apocalyptic number.

135661512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

135661512 is an abundant number, since it is smaller than the sum of its proper divisors (251943288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135661512 is a wasteful number, since it uses less digits than its factorization.

135661512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807525 (or 807521 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 135661512 is about 11647.3821951544. The cubic root of 135661512 is about 513.8293225298.

The spelling of 135661512 in words is "one hundred thirty-five million, six hundred sixty-one thousand, five hundred twelve".