1920315078417 has 4 divisors (see below), whose sum is σ = 2560420104560. Its totient is φ = 1280210052276.

The previous prime is 1920315078403. The next prime is 1920315078467. The reversal of 1920315078417 is 7148705130291.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1920315078417 - 2¹¹ = 1920315076369 is a prime.

It is a super-2 number, since 2×1920315078417² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1920315078467) 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, 320052513067 + ... + 320052513072.

It is an arithmetic number, because the mean of its divisors is an integer number (640105026140).

Almost surely, 2^{1920315078417} is an apocalyptic number.

It is an amenable number.

1920315078417 is a deficient number, since it is larger than the sum of its proper divisors (640105026143).

1920315078417 is an equidigital number, since it uses as much as digits as its factorization.

1920315078417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640105026142.

The product of its (nonzero) digits is 423360, while the sum is 48.

The spelling of 1920315078417 in words is "one trillion, nine hundred twenty billion, three hundred fifteen million, seventy-eight thousand, four hundred seventeen".