19056794549 has 8 divisors (see below), whose sum is σ = 20653421880. Its totient is φ = 17478841536.

The previous prime is 19056794501. The next prime is 19056794557. The reversal of 19056794549 is 94549765091.

It can be written as a sum of positive squares in 4 ways, for example, as 617870449 + 18438924100 = 24857^2 + 135790^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19056794549 - 2⁸ = 19056794293 is a prime.

It is a super-2 number, since 2×19056794549² (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 (19056704549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4666454 + ... + 4670535.

It is an arithmetic number, because the mean of its divisors is an integer number (2581677735).

Almost surely, 2^19056794549 is an apocalyptic number.

It is an amenable number.

19056794549 is a deficient number, since it is larger than the sum of its proper divisors (1596627331).

19056794549 is a wasteful number, since it uses less digits than its factorization.

19056794549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9337159.

The product of its (nonzero) digits is 12247200, while the sum is 59.

The spelling of 19056794549 in words is "nineteen billion, fifty-six million, seven hundred ninety-four thousand, five hundred forty-nine".