7722121080 has 64 divisors (see below), whose sum is σ = 23913676800. Its totient is φ = 1992804480.

The previous prime is 7722121031. The next prime is 7722121087. The reversal of 7722121080 is 801212277.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7722121087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1034200 + ... + 1041639.

It is an arithmetic number, because the mean of its divisors is an integer number (373651200).

Almost surely, 2^7722121080 is an apocalyptic number.

It is an amenable number.

7722121080 is an abundant number, since it is smaller than the sum of its proper divisors (16191555720).

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

7722121080 is a wasteful number, since it uses less digits than its factorization.

7722121080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2075884 (or 2075880 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 7722121080 is about 87875.6000264010. The cubic root of 7722121080 is about 1976.5700130411.

The spelling of 7722121080 in words is "seven billion, seven hundred twenty-two million, one hundred twenty-one thousand, eighty".