43091957474 has 4 divisors (see below), whose sum is σ = 64637936214. Its totient is φ = 21545978736.

The previous prime is 43091957437. The next prime is 43091957479. The reversal of 43091957474 is 47475919034.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47475919034 = 2 ⋅23737959517.

It can be written as a sum of positive squares in only one way, i.e., 27786556249 + 15305401225 = 166693^2 + 123715^2 .

It is not an unprimeable number, because it can be changed into a prime (43091957479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10772989367 + ... + 10772989370.

Almost surely, 2^43091957474 is an apocalyptic number.

43091957474 is a deficient number, since it is larger than the sum of its proper divisors (21545978740).

43091957474 is a wasteful number, since it uses less digits than its factorization.

43091957474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21545978739.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 43091957474 in words is "forty-three billion, ninety-one million, nine hundred fifty-seven thousand, four hundred seventy-four".