43001344661 has 4 divisors (see below), whose sum is σ = 46910557824. Its totient is φ = 39092131500.

The previous prime is 43001344651. The next prime is 43001344679. The reversal of 43001344661 is 16644310034.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43001344661 - 2¹⁸ = 43001082517 is a prime.

It is a super-2 number, since 2×43001344661² (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 (43001344651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1954606565 + ... + 1954606586.

It is an arithmetic number, because the mean of its divisors is an integer number (11727639456).

Almost surely, 2^43001344661 is an apocalyptic number.

It is an amenable number.

43001344661 is a deficient number, since it is larger than the sum of its proper divisors (3909213163).

43001344661 is a wasteful number, since it uses less digits than its factorization.

43001344661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3909213162.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 43001344661 its reverse (16644310034), we get a palindrome (59645654695).

The spelling of 43001344661 in words is "forty-three billion, one million, three hundred forty-four thousand, six hundred sixty-one".