15749220242 has 30 divisors (see below), whose sum is σ = 27574721799. Its totient is φ = 6745938780.

The previous prime is 15749220217. The next prime is 15749220293. The reversal of 15749220242 is 24202294751.

15749220242 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 only one way, i.e., 7874610121 + 7874610121 = 88739^2 + 88739^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=88739.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15749220196 and 15749220205.

It is an unprimeable number.

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 14 ways as a sum of consecutive naturals, for example, 8695517 + ... + 8697327.

Almost surely, 2^15749220242 is an apocalyptic number.

15749220242 is a deficient number, since it is larger than the sum of its proper divisors (11825501557).

15749220242 is an frugal number, since it uses more digits than its factorization.

15749220242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3652 (or 1820 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 15749220242 in words is "fifteen billion, seven hundred forty-nine million, two hundred twenty thousand, two hundred forty-two".