136839033581 has 8 divisors (see below), whose sum is σ = 145077357600. Its totient is φ = 128704336560.

The previous prime is 136839033571. The next prime is 136839033599. The reversal of 136839033581 is 185330938631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136839033581 - 2¹⁸ = 136838771437 is a prime.

It is a super-2 number, since 2×136839033581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136839033511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25904030 + ... + 25909311.

It is an arithmetic number, because the mean of its divisors is an integer number (18134669700).

Almost surely, 2^136839033581 is an apocalyptic number.

It is an amenable number.

136839033581 is a deficient number, since it is larger than the sum of its proper divisors (8238324019).

136839033581 is a wasteful number, since it uses less digits than its factorization.

136839033581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51813499.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 136839033581 in words is "one hundred thirty-six billion, eight hundred thirty-nine million, thirty-three thousand, five hundred eighty-one".