378834217538 has 24 divisors (see below), whose sum is σ = 668454338700. Its totient is φ = 160533276288.

The previous prime is 378834217507. The next prime is 378834217543. The reversal of 378834217538 is 835712438873.

It can be written as a sum of positive squares in 2 ways, for example, as 378757777489 + 76440049 = 615433^2 + 8743^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21708443 + ... + 21725886.

Almost surely, 2^378834217538 is an apocalyptic number.

378834217538 is a deficient number, since it is larger than the sum of its proper divisors (289620121162).

378834217538 is a wasteful number, since it uses less digits than its factorization.

378834217538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43434434 (or 43434427 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 59.

The spelling of 378834217538 in words is "three hundred seventy-eight billion, eight hundred thirty-four million, two hundred seventeen thousand, five hundred thirty-eight".