378915121315 has 16 divisors (see below), whose sum is σ = 455130893088. Its totient is φ = 302843725056.

The previous prime is 378915121303. The next prime is 378915121357. The reversal of 378915121315 is 513121519873.

It is a cyclic number.

It is not a de Polignac number, because 378915121315 - 2¹¹ = 378915119267 is a prime.

It is a super-2 number, since 2×378915121315² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48869479 + ... + 48877231.

It is an arithmetic number, because the mean of its divisors is an integer number (28445680818).

Almost surely, 2^378915121315 is an apocalyptic number.

378915121315 is a deficient number, since it is larger than the sum of its proper divisors (76215771773).

378915121315 is a wasteful number, since it uses less digits than its factorization.

378915121315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15798.

The product of its digits is 226800, while the sum is 46.

The spelling of 378915121315 in words is "three hundred seventy-eight billion, nine hundred fifteen million, one hundred twenty-one thousand, three hundred fifteen".