43961787487 has 4 divisors (see below), whose sum is σ = 45379909696. Its totient is φ = 42543665280.

The previous prime is 43961787481. The next prime is 43961787509. The reversal of 43961787487 is 78478716934.

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

It is a cyclic number.

It is not a de Polignac number, because 43961787487 - 2¹⁵ = 43961754719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43961787481) 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 3 ways as a sum of consecutive naturals, for example, 709061058 + ... + 709061119.

It is an arithmetic number, because the mean of its divisors is an integer number (11344977424).

Almost surely, 2^43961787487 is an apocalyptic number.

43961787487 is a deficient number, since it is larger than the sum of its proper divisors (1418122209).

43961787487 is a wasteful number, since it uses less digits than its factorization.

43961787487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418122208.

The product of its digits is 56899584, while the sum is 64.

The spelling of 43961787487 in words is "forty-three billion, nine hundred sixty-one million, seven hundred eighty-seven thousand, four hundred eighty-seven".