1913996128447 has 16 divisors (see below), whose sum is σ = 2103220274400. Its totient is φ = 1730869575552.

The previous prime is 1913996128427. The next prime is 1913996128573. The reversal of 1913996128447 is 7448216993191.

It is a happy number.

It is not a de Polignac number, because 1913996128447 - 2³⁹ = 1364240314559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913996128427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1585197 + ... + 2518102.

It is an arithmetic number, because the mean of its divisors is an integer number (131451267150).

Almost surely, 2^{1913996128447} is an apocalyptic number.

1913996128447 is a deficient number, since it is larger than the sum of its proper divisors (189224145953).

1913996128447 is a wasteful number, since it uses less digits than its factorization.

1913996128447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104042.

The product of its digits is 23514624, while the sum is 64.

The spelling of 1913996128447 in words is "one trillion, nine hundred thirteen billion, nine hundred ninety-six million, one hundred twenty-eight thousand, four hundred forty-seven".