9888639506072 has 32 divisors (see below), whose sum is σ = 18844515436320. Its totient is φ = 4864045839360.

The previous prime is 9888639506041. The next prime is 9888639506077. The reversal of 9888639506072 is 2706059368889.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 9888639505987 and 9888639506005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9888639506077) 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, 38023379 + ... + 38282562.

It is an arithmetic number, because the mean of its divisors is an integer number (588891107385).

Almost surely, 2^{9888639506072} is an apocalyptic number.

It is an amenable number.

9888639506072 is a deficient number, since it is larger than the sum of its proper divisors (8955875930248).

9888639506072 is a wasteful number, since it uses less digits than its factorization.

9888639506072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76306211 (or 76306207 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 71.

The spelling of 9888639506072 in words is "nine trillion, eight hundred eighty-eight billion, six hundred thirty-nine million, five hundred six thousand, seventy-two".