15005442491 has 4 divisors (see below), whose sum is σ = 16159707312. Its totient is φ = 13851177672.

The previous prime is 15005442481. The next prime is 15005442503. The reversal of 15005442491 is 19424450051.

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 15005442491 - 2¹⁰ = 15005441467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15005442481) 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, 577132391 + ... + 577132416.

It is an arithmetic number, because the mean of its divisors is an integer number (4039926828).

Almost surely, 2^15005442491 is an apocalyptic number.

15005442491 is a deficient number, since it is larger than the sum of its proper divisors (1154264821).

15005442491 is a wasteful number, since it uses less digits than its factorization.

15005442491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154264820.

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 15005442491 in words is "fifteen billion, five million, four hundred forty-two thousand, four hundred ninety-one".