42990504491 has 4 divisors (see below), whose sum is σ = 46898732184. Its totient is φ = 39082276800.

The previous prime is 42990504463. The next prime is 42990504493. The reversal of 42990504491 is 19440509924.

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 42990504491 - 2¹⁰ = 42990503467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42990504493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1954113830 + ... + 1954113851.

It is an arithmetic number, because the mean of its divisors is an integer number (11724683046).

Almost surely, 2^42990504491 is an apocalyptic number.

42990504491 is a deficient number, since it is larger than the sum of its proper divisors (3908227693).

42990504491 is a wasteful number, since it uses less digits than its factorization.

42990504491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3908227692.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 42990504491 in words is "forty-two billion, nine hundred ninety million, five hundred four thousand, four hundred ninety-one".