7850365680021 has 4 divisors (see below), whose sum is σ = 10467154240032. Its totient is φ = 5233577120012.

The previous prime is 7850365680013. The next prime is 7850365680023. The reversal of 7850365680021 is 1200865630587.

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 7850365680021 - 2³ = 7850365680013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7850365680023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1308394280001 + ... + 1308394280006.

It is an arithmetic number, because the mean of its divisors is an integer number (2616788560008).

Almost surely, 2^{7850365680021} is an apocalyptic number.

It is an amenable number.

7850365680021 is a deficient number, since it is larger than the sum of its proper divisors (2616788560011).

7850365680021 is a wasteful number, since it uses less digits than its factorization.

7850365680021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616788560010.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 7850365680021 in words is "seven trillion, eight hundred fifty billion, three hundred sixty-five million, six hundred eighty thousand, twenty-one".