136416643654 has 4 divisors (see below), whose sum is σ = 204624965484. Its totient is φ = 68208321826.

The previous prime is 136416643639. The next prime is 136416643663. The reversal of 136416643654 is 456346614631.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 136416643598 and 136416643607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34104160912 + ... + 34104160915.

It is an arithmetic number, because the mean of its divisors is an integer number (51156241371).

Almost surely, 2^136416643654 is an apocalyptic number.

136416643654 is a deficient number, since it is larger than the sum of its proper divisors (68208321830).

136416643654 is an equidigital number, since it uses as much as digits as its factorization.

136416643654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68208321829.

The product of its digits is 3732480, while the sum is 49.

The spelling of 136416643654 in words is "one hundred thirty-six billion, four hundred sixteen million, six hundred forty-three thousand, six hundred fifty-four".