378309073122 has 18 divisors (see below), whose sum is σ = 819675312417. Its totient is φ = 126102154536.

The previous prime is 378309073099. The next prime is 378309073193. The reversal of 378309073122 is 221370903873.

378309073122 is a `hidden beast` number, since 378 + 3 + 0 + 90 + 73 + 122 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 272130198921 + 106178874201 = 521661^2 + 325851^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=434919.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2537028 + ... + 2682000.

Almost surely, 2^378309073122 is an apocalyptic number.

378309073122 is an abundant number, since it is smaller than the sum of its proper divisors (441366239295).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

378309073122 is an frugal number, since it uses more digits than its factorization.

378309073122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289954 (or 144978 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

Adding to 378309073122 its reverse (221370903873), we get a palindrome (599679976995).

The spelling of 378309073122 in words is "three hundred seventy-eight billion, three hundred nine million, seventy-three thousand, one hundred twenty-two".