15748493049 has 27 divisors (see below), whose sum is σ = 23172597903. Its totient is φ = 10306489104.

The previous prime is 15748493021. The next prime is 15748493051. The reversal of 15748493049 is 94039484751.

The square root of 15748493049 is 125493.

It is a perfect power (a square), and thus also a powerful number.

15748493049 is a `hidden beast` number, since 157 + 484 + 9 + 3 + 0 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2101580649 + 13646912400 = 45843^2 + 116820^2 .

It is not a de Polignac number, because 15748493049 - 2⁵ = 15748493017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15748492986 and 15748493004.

It is not an unprimeable number, because it can be changed into a prime (15748493009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 22211907 + ... + 22212615.

Almost surely, 2^15748493049 is an apocalyptic number.

15748493049 is the 125493-rd square number.

15748493049 is the 62747-th centered octagonal number.

It is an amenable number.

15748493049 is a deficient number, since it is larger than the sum of its proper divisors (7424104854).

15748493049 is an frugal number, since it uses more digits than its factorization.

15748493049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 15748493049 in words is "fifteen billion, seven hundred forty-eight million, four hundred ninety-three thousand, forty-nine".