135136376881 has 27 divisors (see below), whose sum is σ = 155384250987. Its totient is φ = 117429018960.

The previous prime is 135136376861. The next prime is 135136376899. The reversal of 135136376881 is 188673631531.

The square root of 135136376881 is 367609.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 131808933025 + 3327443856 = 363055^2 + 57684^2 .

It is not a de Polignac number, because 135136376881 - 2⁹ = 135136376369 is a prime.

It is a super-2 number, since 2×135136376881² (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 (135136376861) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 93004351 + ... + 93005803.

Almost surely, 2^135136376881 is an apocalyptic number.

135136376881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135136376881 is the 367609-th square number.

135136376881 is the 183805-th centered octagonal number.

It is an amenable number.

135136376881 is a deficient number, since it is larger than the sum of its proper divisors (20247874106).

135136376881 is an frugal number, since it uses more digits than its factorization.

135136376881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2974 (or 1487 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The spelling of 135136376881 in words is "one hundred thirty-five billion, one hundred thirty-six million, three hundred seventy-six thousand, eight hundred eighty-one".