7122821616 has 40 divisors (see below), whose sum is σ = 20445137360. Its totient is φ = 2374273728.

The previous prime is 7122821603. The next prime is 7122821701. The reversal of 7122821616 is 6161282217.

7122821616 is a `hidden beast` number, since 7 + 12 + 2 + 8 + 21 + 616 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8243575 + ... + 8244438.

It is an arithmetic number, because the mean of its divisors is an integer number (511128434).

Almost surely, 2^7122821616 is an apocalyptic number.

It is an amenable number.

7122821616 is an abundant number, since it is smaller than the sum of its proper divisors (13322315744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7122821616 is a wasteful number, since it uses less digits than its factorization.

7122821616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16488030 (or 16488018 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 7122821616 is about 84396.8104610595. The cubic root of 7122821616 is about 1924.0544400754.

The spelling of 7122821616 in words is "seven billion, one hundred twenty-two million, eight hundred twenty-one thousand, six hundred sixteen".