43261493558 has 4 divisors (see below), whose sum is σ = 64892240340. Its totient is φ = 21630746778.

The previous prime is 43261493557. The next prime is 43261493629. The reversal of 43261493558 is 85539416234.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43261493557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10815373388 + ... + 10815373391.

It is an arithmetic number, because the mean of its divisors is an integer number (16223060085).

Almost surely, 2^43261493558 is an apocalyptic number.

43261493558 is a deficient number, since it is larger than the sum of its proper divisors (21630746782).

43261493558 is a wasteful number, since it uses less digits than its factorization.

43261493558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21630746781.

The product of its digits is 3110400, while the sum is 50.

The spelling of 43261493558 in words is "forty-three billion, two hundred sixty-one million, four hundred ninety-three thousand, five hundred fifty-eight".