43123873455 has 48 divisors (see below), whose sum is σ = 81327879360. Its totient is φ = 21011318784.

The previous prime is 43123873447. The next prime is 43123873519. The reversal of 43123873455 is 55437832134.

43123873455 is a `hidden beast` number, since 4 + 3 + 123 + 8 + 73 + 455 = 666.

It is not a de Polignac number, because 43123873455 - 2³ = 43123873447 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 43123873455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 323235 + ... + 436724.

It is an arithmetic number, because the mean of its divisors is an integer number (1694330820).

Almost surely, 2^43123873455 is an apocalyptic number.

43123873455 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

43123873455 is a deficient number, since it is larger than the sum of its proper divisors (38204005905).

43123873455 is a wasteful number, since it uses less digits than its factorization.

43123873455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760080 (or 760077 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The spelling of 43123873455 in words is "forty-three billion, one hundred twenty-three million, eight hundred seventy-three thousand, four hundred fifty-five".