9990402072001 has 16 divisors (see below), whose sum is σ = 11009932373440. Its totient is φ = 9006766695360.

The previous prime is 9990402071999. The next prime is 9990402072043. The reversal of 9990402072001 is 1002702040999.

It is a cyclic number.

It is not a de Polignac number, because 9990402072001 - 2¹ = 9990402071999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (9990402072071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6812170 + ... + 8147788.

It is an arithmetic number, because the mean of its divisors is an integer number (688120773340).

Almost surely, 2^{9990402072001} is an apocalyptic number.

It is an amenable number.

9990402072001 is a deficient number, since it is larger than the sum of its proper divisors (1019530301439).

9990402072001 is a wasteful number, since it uses less digits than its factorization.

9990402072001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349056.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 9990402072001 in words is "nine trillion, nine hundred ninety billion, four hundred two million, seventy-two thousand, one".