61336723218 has 16 divisors (see below), whose sum is σ = 122721043680. Its totient is φ = 20437641536.

The previous prime is 61336723213. The next prime is 61336723243. The reversal of 61336723218 is 81232763316.

It is a self number, because there is not a number n which added to its sum of digits gives 61336723218.

It is not an unprimeable number, because it can be changed into a prime (61336723211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1966455 + ... + 1997402.

It is an arithmetic number, because the mean of its divisors is an integer number (7670065230).

Almost surely, 2^61336723218 is an apocalyptic number.

61336723218 is an abundant number, since it is smaller than the sum of its proper divisors (61384320462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61336723218 is a wasteful number, since it uses less digits than its factorization.

61336723218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3966441.

The product of its digits is 217728, while the sum is 42.

The spelling of 61336723218 in words is "sixty-one billion, three hundred thirty-six million, seven hundred twenty-three thousand, two hundred eighteen".