43577478641 has 8 divisors (see below), whose sum is σ = 44785524264. Its totient is φ = 42371026560.

The previous prime is 43577478619. The next prime is 43577478661. The reversal of 43577478641 is 14687477534.

It can be written as a sum of positive squares in 4 ways, for example, as 21176070400 + 22401408241 = 145520^2 + 149671^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43577478641 - 2¹⁸ = 43577216497 is a prime.

It is a super-2 number, since 2×43577478641² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43577478661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342830 + ... + 452423.

It is an arithmetic number, because the mean of its divisors is an integer number (5598190533).

Almost surely, 2^43577478641 is an apocalyptic number.

It is an amenable number.

43577478641 is a deficient number, since it is larger than the sum of its proper divisors (1208045623).

43577478641 is a wasteful number, since it uses less digits than its factorization.

43577478641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796771.

The product of its digits is 15805440, while the sum is 56.

It can be divided in two parts, 435774 and 78641, that added together give a palindrome (514415).

The spelling of 43577478641 in words is "forty-three billion, five hundred seventy-seven million, four hundred seventy-eight thousand, six hundred forty-one".