61443365164 has 24 divisors (see below), whose sum is σ = 110198914560. Its totient is φ = 29967332304.

The previous prime is 61443365161. The next prime is 61443365173. The reversal of 61443365164 is 46156334416.

It is a self number, because there is not a number n which added to its sum of digits gives 61443365164.

It is not an unprimeable number, because it can be changed into a prime (61443365161) 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, 1145104 + ... + 1197559.

It is an arithmetic number, because the mean of its divisors is an integer number (4591621440).

Almost surely, 2^61443365164 is an apocalyptic number.

It is an amenable number.

61443365164 is a deficient number, since it is larger than the sum of its proper divisors (48755549396).

61443365164 is a wasteful number, since it uses less digits than its factorization.

61443365164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342829 (or 2342827 counting only the distinct ones).

The product of its digits is 622080, while the sum is 43.

The spelling of 61443365164 in words is "sixty-one billion, four hundred forty-three million, three hundred sixty-five thousand, one hundred sixty-four".