135412738681 has 4 divisors (see below), whose sum is σ = 147722987664. Its totient is φ = 123102489700.

The previous prime is 135412738661. The next prime is 135412738729. The reversal of 135412738681 is 186837214531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135412738681 - 2³⁵ = 101053000313 is a prime.

It is a super-2 number, since 2×135412738681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135412738631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6155124475 + ... + 6155124496.

It is an arithmetic number, because the mean of its divisors is an integer number (36930746916).

Almost surely, 2^135412738681 is an apocalyptic number.

135412738681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

135412738681 is a deficient number, since it is larger than the sum of its proper divisors (12310248983).

135412738681 is a wasteful number, since it uses less digits than its factorization.

135412738681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12310248982.

The product of its digits is 967680, while the sum is 49.

The spelling of 135412738681 in words is "one hundred thirty-five billion, four hundred twelve million, seven hundred thirty-eight thousand, six hundred eighty-one".