136980671881 has 9 divisors (see below), whose sum is σ = 141553799373. Its totient is φ = 132550837260.

The previous prime is 136980671879. The next prime is 136980671941. The reversal of 136980671881 is 188176089631.

The square root of 136980671881 is 370109.

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

It is not a de Polignac number, because 136980671881 - 2¹ = 136980671879 is a prime.

It is a super-2 number, since 2×136980671881² (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 (136980671381) 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, 11467410 + ... + 11479348.

Almost surely, 2^136980671881 is an apocalyptic number.

136980671881 is the 370109-th square number.

136980671881 is the 185055-th centered octagonal number.

It is an amenable number.

136980671881 is a deficient number, since it is larger than the sum of its proper divisors (4573127492).

136980671881 is an frugal number, since it uses more digits than its factorization.

136980671881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23940 (or 11970 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 58.

The spelling of 136980671881 in words is "one hundred thirty-six billion, nine hundred eighty million, six hundred seventy-one thousand, eight hundred eighty-one".