135661370 has 24 divisors (see below), whose sum is σ = 264422556. Its totient is φ = 50089728.

The previous prime is 135661367. The next prime is 135661417. The reversal of 135661370 is 73166531.

It can be written as a sum of positive squares in 6 ways, for example, as 5997601 + 129663769 = 2449^2 + 11387^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38447 + ... + 41826.

Almost surely, 2^135661370 is an apocalyptic number.

135661370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135661370 is a deficient number, since it is larger than the sum of its proper divisors (128761186).

135661370 is a wasteful number, since it uses less digits than its factorization.

135661370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80306 (or 80293 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 135661370 is about 11647.3760993625. The cubic root of 135661370 is about 513.8291432508.

It can be divided in two parts, 1356 and 61370, that added together give a palindrome (62726).

The spelling of 135661370 in words is "one hundred thirty-five million, six hundred sixty-one thousand, three hundred seventy".