43654720164 has 96 divisors (see below), whose sum is σ = 111631027200. Its totient is φ = 13168172160.

The previous prime is 43654720163. The next prime is 43654720177. The reversal of 43654720164 is 46102745634.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (43654720163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49776894 + ... + 49777770.

It is an arithmetic number, because the mean of its divisors is an integer number (1162823200).

Almost surely, 2^43654720164 is an apocalyptic number.

43654720164 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

43654720164 is an abundant number, since it is smaller than the sum of its proper divisors (67976307036).

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

43654720164 is a wasteful number, since it uses less digits than its factorization.

43654720164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2193 (or 2191 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 42.

The spelling of 43654720164 in words is "forty-three billion, six hundred fifty-four million, seven hundred twenty thousand, one hundred sixty-four".