43137782891 has 4 divisors (see below), whose sum is σ = 49300323312. Its totient is φ = 36975242472.

The previous prime is 43137782887. The next prime is 43137782899. The reversal of 43137782891 is 19828773134.

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

It is not a de Polignac number, because 43137782891 - 2² = 43137782887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43137782899) 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, 3081270200 + ... + 3081270213.

It is an arithmetic number, because the mean of its divisors is an integer number (12325080828).

Almost surely, 2^43137782891 is an apocalyptic number.

43137782891 is a deficient number, since it is larger than the sum of its proper divisors (6162540421).

43137782891 is an equidigital number, since it uses as much as digits as its factorization.

43137782891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6162540420.

The product of its digits is 2032128, while the sum is 53.

The spelling of 43137782891 in words is "forty-three billion, one hundred thirty-seven million, seven hundred eighty-two thousand, eight hundred ninety-one".