19136544549 has 16 divisors (see below), whose sum is σ = 26198156544. Its totient is φ = 12417753600.

The previous prime is 19136544457. The next prime is 19136544643. The reversal of 19136544549 is 94544563191.

It is not a de Polignac number, because 19136544549 - 2²⁸ = 18868109093 is a prime.

It is a super-2 number, since 2×19136544549² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19136548549) 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 15 ways as a sum of consecutive naturals, for example, 126397 + ... + 232914.

It is an arithmetic number, because the mean of its divisors is an integer number (1637384784).

Almost surely, 2^19136544549 is an apocalyptic number.

It is an amenable number.

19136544549 is a deficient number, since it is larger than the sum of its proper divisors (7061611995).

19136544549 is a wasteful number, since it uses less digits than its factorization.

19136544549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359788.

The product of its digits is 2332800, while the sum is 51.

The spelling of 19136544549 in words is "nineteen billion, one hundred thirty-six million, five hundred forty-four thousand, five hundred forty-nine".