12049531553 has 2 divisors, whose sum is σ = 12049531554. Its totient is φ = 12049531552.

The previous prime is 12049531513. The next prime is 12049531579. The reversal of 12049531553 is 35513594021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7731333184 + 4318198369 = 87928^2 + 65713^2 .

It is a cyclic number.

It is not a de Polignac number, because 12049531553 - 2¹⁸ = 12049269409 is a prime.

It is not a weakly prime, because it can be changed into another prime (12049531513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6024765776 + 6024765777.

It is an arithmetic number, because the mean of its divisors is an integer number (6024765777).

Almost surely, 2^12049531553 is an apocalyptic number.

It is an amenable number.

12049531553 is a deficient number, since it is larger than the sum of its proper divisors (1).

12049531553 is an equidigital number, since it uses as much as digits as its factorization.

12049531553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 12049531553 in words is "twelve billion, forty-nine million, five hundred thirty-one thousand, five hundred fifty-three".