61139522218 has 8 divisors (see below), whose sum is σ = 91711494720. Its totient is φ = 30569023980.

The previous prime is 61139522209. The next prime is 61139522221. The reversal of 61139522218 is 81222593116.

It is a happy number.

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

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 in 3 ways as a sum of consecutive naturals, for example, 258288 + ... + 434731.

It is an arithmetic number, because the mean of its divisors is an integer number (11463936840).

Almost surely, 2^61139522218 is an apocalyptic number.

61139522218 is a deficient number, since it is larger than the sum of its proper divisors (30571972502).

61139522218 is a wasteful number, since it uses less digits than its factorization.

61139522218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737132.

The product of its digits is 51840, while the sum is 40.

The spelling of 61139522218 in words is "sixty-one billion, one hundred thirty-nine million, five hundred twenty-two thousand, two hundred eighteen".