9999928647201 has 4 divisors (see below), whose sum is σ = 13333238196272. Its totient is φ = 6666619098132.

The previous prime is 9999928647161. The next prime is 9999928647211. The reversal of 9999928647201 is 1027468299999.

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 9999928647201 - 2¹⁴ = 9999928630817 is a prime.

It is a super-2 number, since 2×9999928647201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9999928647211) 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, 1666654774531 + ... + 1666654774536.

It is an arithmetic number, because the mean of its divisors is an integer number (3333309549068).

Almost surely, 2^{9999928647201} is an apocalyptic number.

It is an amenable number.

9999928647201 is a deficient number, since it is larger than the sum of its proper divisors (3333309549071).

9999928647201 is a wasteful number, since it uses less digits than its factorization.

9999928647201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333309549070.

The product of its (nonzero) digits is 317447424, while the sum is 75.

The spelling of 9999928647201 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred twenty-eight million, six hundred forty-seven thousand, two hundred one".