7889820681601 has 4 divisors (see below), whose sum is σ = 7891519979952. Its totient is φ = 7888121383252.

The previous prime is 7889820681599. The next prime is 7889820681629. The reversal of 7889820681601 is 1061860289887.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 7889820681601 - 2¹ = 7889820681599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7889820681661) 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, 849642211 + ... + 849651496.

It is an arithmetic number, because the mean of its divisors is an integer number (1972879994988).

Almost surely, 2^{7889820681601} is an apocalyptic number.

It is an amenable number.

7889820681601 is a deficient number, since it is larger than the sum of its proper divisors (1699298351).

7889820681601 is a wasteful number, since it uses less digits than its factorization.

7889820681601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699298350.

The product of its (nonzero) digits is 18579456, while the sum is 64.

The spelling of 7889820681601 in words is "seven trillion, eight hundred eighty-nine billion, eight hundred twenty million, six hundred eighty-one thousand, six hundred one".