9191864642 has 32 divisors (see below), whose sum is σ = 14463282240. Its totient is φ = 4377542400.

The previous prime is 9191864611. The next prime is 9191864719. The reversal of 9191864642 is 2464681919.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550517 + ... + 566967.

It is an arithmetic number, because the mean of its divisors is an integer number (451977570).

Almost surely, 2^9191864642 is an apocalyptic number.

9191864642 is a deficient number, since it is larger than the sum of its proper divisors (5271417598).

9191864642 is a wasteful number, since it uses less digits than its factorization.

9191864642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16658.

The product of its digits is 746496, while the sum is 50.

The square root of 9191864642 is about 95874.2126017210. The cubic root of 9191864642 is about 2094.7612916220.

The spelling of 9191864642 in words is "nine billion, one hundred ninety-one million, eight hundred sixty-four thousand, six hundred forty-two".