7857221499997 has 8 divisors (see below), whose sum is σ = 7867611794880. Its totient is φ = 7846836574080.

The previous prime is 7857221499943. The next prime is 7857221500031. The reversal of 7857221499997 is 7999941227587.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7857221499997 - 2²⁷ = 7857087282269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7857221499917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1590829 + ... + 4271437.

It is an arithmetic number, because the mean of its divisors is an integer number (983451474360).

Almost surely, 2^{7857221499997} is an apocalyptic number.

It is an amenable number.

7857221499997 is a deficient number, since it is larger than the sum of its proper divisors (10390294883).

7857221499997 is a wasteful number, since it uses less digits than its factorization.

7857221499997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684483.

The product of its digits is 1440270720, while the sum is 79.

The spelling of 7857221499997 in words is "seven trillion, eight hundred fifty-seven billion, two hundred twenty-one million, four hundred ninety-nine thousand, nine hundred ninety-seven".