1378170805317 has 32 divisors (see below), whose sum is σ = 2048486584320. Its totient is φ = 819049916160.

The previous prime is 1378170805303. The next prime is 1378170805357. The reversal of 1378170805317 is 7135080718731.

It is not a de Polignac number, because 1378170805317 - 2⁷ = 1378170805189 is a prime.

It is a super-3 number, since 3×1378170805317³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 1378170805317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378170805357) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4534038 + ... + 4828440.

It is an arithmetic number, because the mean of its divisors is an integer number (64015205760).

Almost surely, 2^{1378170805317} is an apocalyptic number.

1378170805317 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1378170805317 is a deficient number, since it is larger than the sum of its proper divisors (670315779003).

1378170805317 is a wasteful number, since it uses less digits than its factorization.

1378170805317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299273.

The product of its (nonzero) digits is 987840, while the sum is 51.

The spelling of 1378170805317 in words is "one trillion, three hundred seventy-eight billion, one hundred seventy million, eight hundred five thousand, three hundred seventeen".