43981194761 has 8 divisors (see below), whose sum is σ = 51116159040. Its totient is φ = 37059214608.

The previous prime is 43981194749. The next prime is 43981194787. The reversal of 43981194761 is 16749118934.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43981194761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43981194701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53245586 + ... + 53246411.

It is an arithmetic number, because the mean of its divisors is an integer number (6389519880).

Almost surely, 2^43981194761 is an apocalyptic number.

It is an amenable number.

43981194761 is a deficient number, since it is larger than the sum of its proper divisors (7134964279).

43981194761 is a wasteful number, since it uses less digits than its factorization.

43981194761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106492063.

The product of its digits is 1306368, while the sum is 53.

The spelling of 43981194761 in words is "forty-three billion, nine hundred eighty-one million, one hundred ninety-four thousand, seven hundred sixty-one".