61318223911 has 16 divisors (see below), whose sum is σ = 70485488640. Its totient is φ = 52253722080.

The previous prime is 61318223893. The next prime is 61318223921. The reversal of 61318223911 is 11932281316.

It is not a de Polignac number, because 61318223911 - 2¹¹ = 61318221863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61318223921) 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 15 ways as a sum of consecutive naturals, for example, 804546 + ... + 877456.

It is an arithmetic number, because the mean of its divisors is an integer number (4405343040).

Almost surely, 2^61318223911 is an apocalyptic number.

61318223911 is a deficient number, since it is larger than the sum of its proper divisors (9167264729).

61318223911 is a wasteful number, since it uses less digits than its factorization.

61318223911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73614.

The product of its digits is 15552, while the sum is 37.

The spelling of 61318223911 in words is "sixty-one billion, three hundred eighteen million, two hundred twenty-three thousand, nine hundred eleven".