43551061660506 has 64 divisors (see below), whose sum is σ = 94372812806400. Its totient is φ = 13357182913536.

The previous prime is 43551061660489. The next prime is 43551061660577. The reversal of 43551061660506 is 60506616015534.

43551061660506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19150831 + ... + 21303906.

It is an arithmetic number, because the mean of its divisors is an integer number (1474575200100).

Almost surely, 2^{43551061660506} is an apocalyptic number.

43551061660506 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

43551061660506 is an abundant number, since it is smaller than the sum of its proper divisors (50821751145894).

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

43551061660506 is a wasteful number, since it uses less digits than its factorization.

43551061660506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40455063.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 43551061660506 in words is "forty-three trillion, five hundred fifty-one billion, sixty-one million, six hundred sixty thousand, five hundred six".