19754125376449 has 4 divisors (see below), whose sum is σ = 19757188512900. Its totient is φ = 19751062240000.

The previous prime is 19754125376413. The next prime is 19754125376483. The reversal of 19754125376449 is 94467352145791.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12160005894400 + 7594119482049 = 3487120^2 + 2755743^2 .

It is a cyclic number.

It is not a de Polignac number, because 19754125376449 - 2³⁹ = 19204369562561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19754125376749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1531558552 + ... + 1531571449.

It is an arithmetic number, because the mean of its divisors is an integer number (4939297128225).

Almost surely, 2^{19754125376449} is an apocalyptic number.

It is an amenable number.

19754125376449 is a deficient number, since it is larger than the sum of its proper divisors (3063136451).

19754125376449 is an equidigital number, since it uses as much as digits as its factorization.

19754125376449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063136450.

The product of its digits is 228614400, while the sum is 67.

The spelling of 19754125376449 in words is "nineteen trillion, seven hundred fifty-four billion, one hundred twenty-five million, three hundred seventy-six thousand, four hundred forty-nine".