135252161621 has 8 divisors (see below), whose sum is σ = 137552179200. Its totient is φ = 132952397760.

The previous prime is 135252161587. The next prime is 135252161663. The reversal of 135252161621 is 126161252531.

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 135252161621 - 2¹⁸ = 135251899477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135252161321) 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, 1236140 + ... + 1341098.

It is an arithmetic number, because the mean of its divisors is an integer number (17194022400).

Almost surely, 2^135252161621 is an apocalyptic number.

It is an amenable number.

135252161621 is a deficient number, since it is larger than the sum of its proper divisors (2300017579).

135252161621 is a wasteful number, since it uses less digits than its factorization.

135252161621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126859.

The product of its digits is 21600, while the sum is 35.

The spelling of 135252161621 in words is "one hundred thirty-five billion, two hundred fifty-two million, one hundred sixty-one thousand, six hundred twenty-one".