9959371643 has 8 divisors (see below), whose sum is σ = 11071460736. Its totient is φ = 8896708800.

The previous prime is 9959371627. The next prime is 9959371651. The reversal of 9959371643 is 3461739599.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9959371643 - 2⁴ = 9959371627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9959371663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12356138 + ... + 12356943.

It is an arithmetic number, because the mean of its divisors is an integer number (1383932592).

Almost surely, 2^9959371643 is an apocalyptic number.

9959371643 is a deficient number, since it is larger than the sum of its proper divisors (1112089093).

9959371643 is a wasteful number, since it uses less digits than its factorization.

9959371643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24713125.

The product of its digits is 5511240, while the sum is 56.

The square root of 9959371643 is about 99796.6514618602. The cubic root of 9959371643 is about 2151.5130249799.

The spelling of 9959371643 in words is "nine billion, nine hundred fifty-nine million, three hundred seventy-one thousand, six hundred forty-three".