136629734881 has 4 divisors (see below), whose sum is σ = 136638973332. Its totient is φ = 136620496432.

The previous prime is 136629734867. The next prime is 136629734897. The reversal of 136629734881 is 188437926631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21409542400 + 115220192481 = 146320^2 + 339441^2 .

It is a cyclic number.

It is not a de Polignac number, because 136629734881 - 2⁵ = 136629734849 is a prime.

It is a super-3 number, since 3×136629734881³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136629734821) 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, 4597006 + ... + 4626631.

It is an arithmetic number, because the mean of its divisors is an integer number (34159743333).

Almost surely, 2^136629734881 is an apocalyptic number.

It is an amenable number.

136629734881 is a deficient number, since it is larger than the sum of its proper divisors (9238451).

136629734881 is an equidigital number, since it uses as much as digits as its factorization.

136629734881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9238450.

The product of its digits is 10450944, while the sum is 58.

The spelling of 136629734881 in words is "one hundred thirty-six billion, six hundred twenty-nine million, seven hundred thirty-four thousand, eight hundred eighty-one".