61318223918 has 8 divisors (see below), whose sum is σ = 105116955312. Its totient is φ = 26279238816.

The previous prime is 61318223893. The next prime is 61318223921. The reversal of 61318223918 is 81932281316.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2189936555 + ... + 2189936582.

It is an arithmetic number, because the mean of its divisors is an integer number (13139619414).

Almost surely, 2^61318223918 is an apocalyptic number.

61318223918 is a deficient number, since it is larger than the sum of its proper divisors (43798731394).

61318223918 is a wasteful number, since it uses less digits than its factorization.

61318223918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4379873146.

The product of its digits is 124416, while the sum is 44.

The spelling of 61318223918 in words is "sixty-one billion, three hundred eighteen million, two hundred twenty-three thousand, nine hundred eighteen".