9139454644 has 24 divisors (see below), whose sum is σ = 16077156480. Its totient is φ = 4546020864.

The previous prime is 9139454633. The next prime is 9139454663. The reversal of 9139454644 is 4464549319.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1069332 + ... + 1077844.

It is an arithmetic number, because the mean of its divisors is an integer number (669881520).

Almost surely, 2^9139454644 is an apocalyptic number.

It is an amenable number.

9139454644 is a deficient number, since it is larger than the sum of its proper divisors (6937701836).

9139454644 is a wasteful number, since it uses less digits than its factorization.

9139454644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9879 (or 9877 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 49.

The square root of 9139454644 is about 95600.4949987185. The cubic root of 9139454644 is about 2090.7724107920.

The spelling of 9139454644 in words is "nine billion, one hundred thirty-nine million, four hundred fifty-four thousand, six hundred forty-four".