378815253518 has 16 divisors (see below), whose sum is σ = 644139298320. Its totient is φ = 165635819136.

The previous prime is 378815253473. The next prime is 378815253533. The reversal of 378815253518 is 815352518873.

It is a super-2 number, since 2×378815253518² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383415755 + ... + 383416742.

It is an arithmetic number, because the mean of its divisors is an integer number (40258706145).

Almost surely, 2^378815253518 is an apocalyptic number.

378815253518 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

378815253518 is a deficient number, since it is larger than the sum of its proper divisors (265324044802).

378815253518 is a wasteful number, since it uses less digits than its factorization.

378815253518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766832531.

The product of its digits is 8064000, while the sum is 56.

The spelling of 378815253518 in words is "three hundred seventy-eight billion, eight hundred fifteen million, two hundred fifty-three thousand, five hundred eighteen".