378508161 has 4 divisors (see below), whose sum is σ = 504677552. Its totient is φ = 252338772.

The previous prime is 378508157. The next prime is 378508181. The reversal of 378508161 is 161805873.

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 378508161 - 2² = 378508157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378508181) 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, 63084691 + ... + 63084696.

It is an arithmetic number, because the mean of its divisors is an integer number (126169388).

Almost surely, 2^378508161 is an apocalyptic number.

It is an amenable number.

378508161 is a deficient number, since it is larger than the sum of its proper divisors (126169391).

378508161 is a wasteful number, since it uses less digits than its factorization.

378508161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126169390.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 378508161 is about 19455.2861968155. The cubic root of 378508161 is about 723.3665395408.

The spelling of 378508161 in words is "three hundred seventy-eight million, five hundred eight thousand, one hundred sixty-one".