9913391642 has 16 divisors (see below), whose sum is σ = 18539330112. Its totient is φ = 3862360320.

The previous prime is 9913391573. The next prime is 9913391773. The reversal of 9913391642 is 2461933199.

It is a happy 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, 32186183 + ... + 32186490.

It is an arithmetic number, because the mean of its divisors is an integer number (1158708132).

Almost surely, 2^9913391642 is an apocalyptic number.

9913391642 is a deficient number, since it is larger than the sum of its proper divisors (8625938470).

9913391642 is a wasteful number, since it uses less digits than its factorization.

9913391642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64372693.

The product of its digits is 314928, while the sum is 47.

The square root of 9913391642 is about 99566.0165016157. The cubic root of 9913391642 is about 2148.1969120677.

The spelling of 9913391642 in words is "nine billion, nine hundred thirteen million, three hundred ninety-one thousand, six hundred forty-two".