378853486561 has 4 divisors (see below), whose sum is σ = 413294712624. Its totient is φ = 344412260500.

The previous prime is 378853486549. The next prime is 378853486567. The reversal of 378853486561 is 165684358873.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 378853486561 - 2¹⁵ = 378853453793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 378853486493 and 378853486502.

It is not an unprimeable number, because it can be changed into a prime (378853486567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17220613015 + ... + 17220613036.

It is an arithmetic number, because the mean of its divisors is an integer number (103323678156).

Almost surely, 2^378853486561 is an apocalyptic number.

It is an amenable number.

378853486561 is a deficient number, since it is larger than the sum of its proper divisors (34441226063).

378853486561 is a wasteful number, since it uses less digits than its factorization.

378853486561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34441226062.

The product of its digits is 116121600, while the sum is 64.

The spelling of 378853486561 in words is "three hundred seventy-eight billion, eight hundred fifty-three million, four hundred eighty-six thousand, five hundred sixty-one".