1913796978641 has 8 divisors (see below), whose sum is σ = 1920905779200. Its totient is φ = 1906688522880.

The previous prime is 1913796978607. The next prime is 1913796978703. The reversal of 1913796978641 is 1468796973191.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1913796978641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1913796978241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18237200 + ... + 18341838.

It is an arithmetic number, because the mean of its divisors is an integer number (240113222400).

Almost surely, 2^{1913796978641} is an apocalyptic number.

It is an amenable number.

1913796978641 is a deficient number, since it is larger than the sum of its proper divisors (7108800559).

1913796978641 is a wasteful number, since it uses less digits than its factorization.

1913796978641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172399.

The product of its digits is 123451776, while the sum is 71.

The spelling of 1913796978641 in words is "one trillion, nine hundred thirteen billion, seven hundred ninety-six million, nine hundred seventy-eight thousand, six hundred forty-one".