43256381773 has 16 divisors (see below), whose sum is σ = 49498324992. Its totient is φ = 37417270000.

The previous prime is 43256381747. The next prime is 43256381789. The reversal of 43256381773 is 37718365234.

It is not a de Polignac number, because 43256381773 - 2³³ = 34666447181 is a prime.

It is a super-2 number, since 2×43256381773² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43256381573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399253 + ... + 495898.

It is an arithmetic number, because the mean of its divisors is an integer number (3093645312).

Almost surely, 2^43256381773 is an apocalyptic number.

It is an amenable number.

43256381773 is a deficient number, since it is larger than the sum of its proper divisors (6241943219).

43256381773 is a wasteful number, since it uses less digits than its factorization.

43256381773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895376.

The product of its digits is 2540160, while the sum is 49.

The spelling of 43256381773 in words is "forty-three billion, two hundred fifty-six million, three hundred eighty-one thousand, seven hundred seventy-three".