378273217345 has 4 divisors (see below), whose sum is σ = 453927860820. Its totient is φ = 302618573872.

The previous prime is 378273217337. The next prime is 378273217351. The reversal of 378273217345 is 543712372873.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 153861631504 + 224411585841 = 392252^2 + 473721^2 .

It is a cyclic number.

It is not a de Polignac number, because 378273217345 - 2³ = 378273217337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 378273217292 and 378273217301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37827321730 + ... + 37827321739.

It is an arithmetic number, because the mean of its divisors is an integer number (113481965205).

Almost surely, 2^378273217345 is an apocalyptic number.

It is an amenable number.

378273217345 is a deficient number, since it is larger than the sum of its proper divisors (75654643475).

378273217345 is an equidigital number, since it uses as much as digits as its factorization.

378273217345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75654643474.

The product of its digits is 5927040, while the sum is 52.

The spelling of 378273217345 in words is "three hundred seventy-eight billion, two hundred seventy-three million, two hundred seventeen thousand, three hundred forty-five".