1547429017849 has 27 divisors (see below), whose sum is σ = 1842007185039. Its totient is φ = 1298392558320.

The previous prime is 1547429017817. The next prime is 1547429017943. The reversal of 1547429017849 is 9487109247451.

The square root of 1547429017849 is 1243957.

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

It can be written as a sum of positive squares in only one way, i.e., 228909618025 + 1318519399824 = 478445^2 + 1148268^2 .

It is not a de Polignac number, because 1547429017849 - 2⁵ = 1547429017817 is a prime.

It is a super-2 number, since 2×1547429017849² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1547429087849) 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, 177881502 + ... + 177890200.

Almost surely, 2^{1547429017849} is an apocalyptic number.

1547429017849 is the 1243957-th square number.

1547429017849 is the 621979-th centered octagonal number.

It is an amenable number.

1547429017849 is a deficient number, since it is larger than the sum of its proper divisors (294578167190).

1547429017849 is an frugal number, since it uses more digits than its factorization.

1547429017849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17446 (or 8723 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 1547429017849 in words is "one trillion, five hundred forty-seven billion, four hundred twenty-nine million, seventeen thousand, eight hundred forty-nine".