15661653332 has 24 divisors (see below), whose sum is σ = 29524269096. Its totient is φ = 7226477568.

The previous prime is 15661653331. The next prime is 15661653341. The reversal of 15661653332 is 23335616651.

15661653332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1065630736 + 14596022596 = 32644^2 + 120814^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 15661653332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15661653331) 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 7 ways as a sum of consecutive naturals, for example, 160028 + ... + 238604.

It is an arithmetic number, because the mean of its divisors is an integer number (1230177879).

Almost surely, 2^15661653332 is an apocalyptic number.

It is an amenable number.

15661653332 is a deficient number, since it is larger than the sum of its proper divisors (13862615764).

15661653332 is a wasteful number, since it uses less digits than its factorization.

15661653332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82427 (or 82425 counting only the distinct ones).

The product of its digits is 291600, while the sum is 41.

The spelling of 15661653332 in words is "fifteen billion, six hundred sixty-one million, six hundred fifty-three thousand, three hundred thirty-two".