135653412581 has 8 divisors (see below), whose sum is σ = 136743552000. Its totient is φ = 134567230960.

The previous prime is 135653412563. The next prime is 135653412611. The reversal of 135653412581 is 185214356531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135653412581 is a prime.

It is a super-2 number, since 2×135653412581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135653411581) 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, 920606 + ... + 1057743.

It is an arithmetic number, because the mean of its divisors is an integer number (17092944000).

Almost surely, 2^135653412581 is an apocalyptic number.

It is an amenable number.

135653412581 is a deficient number, since it is larger than the sum of its proper divisors (1090139419).

135653412581 is a wasteful number, since it uses less digits than its factorization.

135653412581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978899.

The product of its digits is 432000, while the sum is 44.

The spelling of 135653412581 in words is "one hundred thirty-five billion, six hundred fifty-three million, four hundred twelve thousand, five hundred eighty-one".