43628312171881 has 16 divisors (see below), whose sum is σ = 44836009311744. Its totient is φ = 42422126030784.

The previous prime is 43628312171863. The next prime is 43628312171933. The reversal of 43628312171881 is 18817121382634.

It is a cyclic number.

It is not a de Polignac number, because 43628312171881 - 2³⁷ = 43490873218409 is a prime.

It is a super-2 number, since 2×43628312171881² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43628312172881) 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, 408976156 + ... + 409082818.

It is an arithmetic number, because the mean of its divisors is an integer number (2802250581984).

Almost surely, 2^{43628312171881} is an apocalyptic number.

It is an amenable number.

43628312171881 is a deficient number, since it is larger than the sum of its proper divisors (1207697139863).

43628312171881 is a wasteful number, since it uses less digits than its factorization.

43628312171881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113640.

The product of its digits is 3096576, while the sum is 55.

The spelling of 43628312171881 in words is "forty-three trillion, six hundred twenty-eight billion, three hundred twelve million, one hundred seventy-one thousand, eight hundred eighty-one".