9729667864 has 16 divisors (see below), whose sum is σ = 20849288400. Its totient is φ = 4169857632.

The previous prime is 9729667859. The next prime is 9729667873. The reversal of 9729667864 is 4687669279.

It is a junction number, because it is equal to n+sod(n) for n = 9729667796 and 9729667805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86871979 + ... + 86872090.

It is an arithmetic number, because the mean of its divisors is an integer number (1303080525).

Almost surely, 2^9729667864 is an apocalyptic number.

It is an amenable number.

9729667864 is an abundant number, since it is smaller than the sum of its proper divisors (11119620536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9729667864 is a wasteful number, since it uses less digits than its factorization.

9729667864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173744082 (or 173744078 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 64.

The square root of 9729667864 is about 98639.0787872636. The cubic root of 9729667864 is about 2134.8433112123.

The spelling of 9729667864 in words is "nine billion, seven hundred twenty-nine million, six hundred sixty-seven thousand, eight hundred sixty-four".