43121605621874 has 32 divisors (see below), whose sum is σ = 71282455083840. Its totient is φ = 19438202048832.

The previous prime is 43121605621817. The next prime is 43121605621901. The reversal of 43121605621874 is 47812650612134.

It is a happy number.

43121605621874 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 15 ways as a sum of consecutive naturals, for example, 16514324 + ... + 18946400.

It is an arithmetic number, because the mean of its divisors is an integer number (2227576721370).

Almost surely, 2^{43121605621874} is an apocalyptic number.

43121605621874 is a deficient number, since it is larger than the sum of its proper divisors (28160849461966).

43121605621874 is a wasteful number, since it uses less digits than its factorization.

43121605621874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447994.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 43121605621874 in words is "forty-three trillion, one hundred twenty-one billion, six hundred five million, six hundred twenty-one thousand, eight hundred seventy-four".