43975074961 has 4 divisors (see below), whose sum is σ = 43976095924. Its totient is φ = 43974054000.

The previous prime is 43975074931. The next prime is 43975075019. The reversal of 43975074961 is 16947057934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16947057934 = 2 ⋅8473528967.

It can be written as a sum of positive squares in 2 ways, for example, as 39770330625 + 4204744336 = 199425^2 + 64844^2 .

It is a cyclic number.

It is not a de Polignac number, because 43975074961 - 2⁵ = 43975074929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43975074931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442890 + ... + 533011.

It is an arithmetic number, because the mean of its divisors is an integer number (10994023981).

Almost surely, 2^43975074961 is an apocalyptic number.

It is an amenable number.

43975074961 is a deficient number, since it is larger than the sum of its proper divisors (1020963).

43975074961 is an equidigital number, since it uses as much as digits as its factorization.

43975074961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020962.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 43975074961 in words is "forty-three billion, nine hundred seventy-five million, seventy-four thousand, nine hundred sixty-one".