9968161637 has 4 divisors (see below), whose sum is σ = 11392184736. Its totient is φ = 8544138540.

The previous prime is 9968161589. The next prime is 9968161649. The reversal of 9968161637 is 7361618699.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9968161637 - 2¹⁶ = 9968096101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9968161657) 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, 712011539 + ... + 712011552.

It is an arithmetic number, because the mean of its divisors is an integer number (2848046184).

Almost surely, 2^9968161637 is an apocalyptic number.

It is an amenable number.

9968161637 is a deficient number, since it is larger than the sum of its proper divisors (1424023099).

9968161637 is a wasteful number, since it uses less digits than its factorization.

9968161637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424023098.

The product of its digits is 2939328, while the sum is 56.

The square root of 9968161637 is about 99840.6812727157. The cubic root of 9968161637 is about 2152.1458033730.

The spelling of 9968161637 in words is "nine billion, nine hundred sixty-eight million, one hundred sixty-one thousand, six hundred thirty-seven".