136641643 has 16 divisors (see below), whose sum is σ = 149216256. Its totient is φ = 124759360.

The previous prime is 136641641. The next prime is 136641667. The reversal of 136641643 is 346146631.

136641643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 136641643 - 2¹ = 136641641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136641599 and 136641608.

It is not an unprimeable number, because it can be changed into a prime (136641641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42780 + ... + 45862.

It is an arithmetic number, because the mean of its divisors is an integer number (9326016).

Almost surely, 2^136641643 is an apocalyptic number.

136641643 is a deficient number, since it is larger than the sum of its proper divisors (12574613).

136641643 is a wasteful number, since it uses less digits than its factorization.

136641643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194.

The product of its digits is 31104, while the sum is 34.

The square root of 136641643 is about 11689.3816346289. The cubic root of 136641643 is about 515.0637970421.

The spelling of 136641643 in words is "one hundred thirty-six million, six hundred forty-one thousand, six hundred forty-three".