43990268541 has 4 divisors (see below), whose sum is σ = 58653691392. Its totient is φ = 29326845692.

The previous prime is 43990268527. The next prime is 43990268563. The reversal of 43990268541 is 14586209934.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43990268541 - 2¹⁸ = 43990006397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43990268521) 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, 7331711421 + ... + 7331711426.

It is an arithmetic number, because the mean of its divisors is an integer number (14663422848).

Almost surely, 2^43990268541 is an apocalyptic number.

It is an amenable number.

43990268541 is a deficient number, since it is larger than the sum of its proper divisors (14663422851).

43990268541 is a wasteful number, since it uses less digits than its factorization.

43990268541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14663422850.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 43990268541 in words is "forty-three billion, nine hundred ninety million, two hundred sixty-eight thousand, five hundred forty-one".