136241453881 has 9 divisors (see below), whose sum is σ = 147532924269. Its totient is φ = 125756912736.

The previous prime is 136241453869. The next prime is 136241453897. The reversal of 136241453881 is 188354142631.

The square root of 136241453881 is 369109.

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

It can be written as a sum of positive squares in 4 ways, for example, as 7719203881 + 128522250000 = 87859^2 + 358500^2 .

It is not a de Polignac number, because 136241453881 - 2⁷ = 136241453753 is a prime.

It is a super-2 number, since 2×136241453881² (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 (136241453681) 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, 4784221 + ... + 4812613.

It is an arithmetic number, because the mean of its divisors is an integer number (16392547141).

Almost surely, 2^136241453881 is an apocalyptic number.

136241453881 is the 369109-th square number.

136241453881 is the 184555-th centered octagonal number.

It is an amenable number.

136241453881 is a deficient number, since it is larger than the sum of its proper divisors (11291470388).

136241453881 is an frugal number, since it uses more digits than its factorization.

136241453881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56812 (or 28406 counting only the distinct ones).

The product of its digits is 552960, while the sum is 46.

The spelling of 136241453881 in words is "one hundred thirty-six billion, two hundred forty-one million, four hundred fifty-three thousand, eight hundred eighty-one".