7999902100001 has 16 divisors (see below), whose sum is σ = 9159456556800. Its totient is φ = 6844534941888.

The previous prime is 7999902099997. The next prime is 7999902100061. The reversal of 7999902100001 is 1000012099997.

It is a happy number.

It is not a de Polignac number, because 7999902100001 - 2² = 7999902099997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7999902100061) 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, 9773855 + ... + 10560683.

It is an arithmetic number, because the mean of its divisors is an integer number (572466034800).

Almost surely, 2^{7999902100001} is an apocalyptic number.

It is an amenable number.

7999902100001 is a deficient number, since it is larger than the sum of its proper divisors (1159554456799).

7999902100001 is a wasteful number, since it uses less digits than its factorization.

7999902100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789488.

The product of its (nonzero) digits is 91854, while the sum is 47.

Adding to 7999902100001 its reverse (1000012099997), we get a palindrome (8999914199998).

The spelling of 7999902100001 in words is "seven trillion, nine hundred ninety-nine billion, nine hundred two million, one hundred thousand, one".