43261398487 has 4 divisors (see below), whose sum is σ = 45142328880. Its totient is φ = 41380468096.

The previous prime is 43261398449. The next prime is 43261398529. The reversal of 43261398487 is 78489316234.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43261398487 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 (43261398407) 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, 940465162 + ... + 940465207.

It is an arithmetic number, because the mean of its divisors is an integer number (11285582220).

Almost surely, 2^43261398487 is an apocalyptic number.

43261398487 is a deficient number, since it is larger than the sum of its proper divisors (1880930393).

43261398487 is a wasteful number, since it uses less digits than its factorization.

43261398487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880930392.

The product of its digits is 6967296, while the sum is 55.

The spelling of 43261398487 in words is "forty-three billion, two hundred sixty-one million, three hundred ninety-eight thousand, four hundred eighty-seven".