136080569881 has 9 divisors (see below), whose sum is σ = 137534089791. Its totient is φ = 134642263872.

The previous prime is 136080569879. The next prime is 136080569897. The reversal of 136080569881 is 188965080631.

The square root of 136080569881 is 368891.

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., 61105368025 + 74975201856 = 247195^2 + 273816^2 .

It is not a de Polignac number, because 136080569881 - 2¹ = 136080569879 is a prime.

It is a super-2 number, since 2×136080569881² (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 (136080569081) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 35780526 + ... + 35784328.

Almost surely, 2^136080569881 is an apocalyptic number.

136080569881 is the 368891-st square number.

136080569881 is the 184446-th centered octagonal number.

It is an amenable number.

136080569881 is a deficient number, since it is larger than the sum of its proper divisors (1453519910).

136080569881 is an frugal number, since it uses more digits than its factorization.

136080569881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7800 (or 3900 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 136080569881 in words is "one hundred thirty-six billion, eighty million, five hundred sixty-nine thousand, eight hundred eighty-one".