7721546612 has 48 divisors (see below), whose sum is σ = 15080306640. Its totient is φ = 3434876928.

The previous prime is 7721546597. The next prime is 7721546621. The reversal of 7721546612 is 2166451277.

It can be written as a sum of positive squares in 8 ways, for example, as 1558354576 + 6163192036 = 39476^2 + 78506^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7721546612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 920228 + ... + 928580.

It is an arithmetic number, because the mean of its divisors is an integer number (314173055).

Almost surely, 2^7721546612 is an apocalyptic number.

It is an amenable number.

7721546612 is a deficient number, since it is larger than the sum of its proper divisors (7358760028).

7721546612 is a wasteful number, since it uses less digits than its factorization.

7721546612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9012 (or 9010 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 7721546612 is about 87872.3313222086. The cubic root of 7721546612 is about 1976.5209978215.

Adding to 7721546612 its reverse (2166451277), we get a palindrome (9887997889).

The spelling of 7721546612 in words is "seven billion, seven hundred twenty-one million, five hundred forty-six thousand, six hundred twelve".