43623133556421 has 16 divisors (see below), whose sum is σ = 59738162040704. Its totient is φ = 28295149137984.

The previous prime is 43623133556419. The next prime is 43623133556423. The reversal of 43623133556421 is 12465533132634.

It is an interprime number because it is at equal distance from previous prime (43623133556419) and next prime (43623133556423).

It is not a de Polignac number, because 43623133556421 - 2¹ = 43623133556419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43623133556423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3137161 + ... + 9853326.

It is an arithmetic number, because the mean of its divisors is an integer number (3733635127544).

Almost surely, 2^{43623133556421} is an apocalyptic number.

It is an amenable number.

43623133556421 is a deficient number, since it is larger than the sum of its proper divisors (16115028484283).

43623133556421 is a wasteful number, since it uses less digits than its factorization.

43623133556421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13020780.

The product of its digits is 4665600, while the sum is 48.

The spelling of 43623133556421 in words is "forty-three trillion, six hundred twenty-three billion, one hundred thirty-three million, five hundred fifty-six thousand, four hundred twenty-one".