378645081 has 4 divisors (see below), whose sum is σ = 504860112. Its totient is φ = 252430052.

The previous prime is 378645079. The next prime is 378645089. The reversal of 378645081 is 180546873.

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 a cyclic number.

It is not a de Polignac number, because 378645081 - 2¹ = 378645079 is a prime.

It is a super-2 number, since 2×378645081² = 286744194730993122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (378645089) 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, 63107511 + ... + 63107516.

It is an arithmetic number, because the mean of its divisors is an integer number (126215028).

Almost surely, 2^378645081 is an apocalyptic number.

It is an amenable number.

378645081 is a deficient number, since it is larger than the sum of its proper divisors (126215031).

378645081 is a wasteful number, since it uses less digits than its factorization.

378645081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126215030.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 378645081 is about 19458.8047166315. The cubic root of 378645081 is about 723.4537515807.

The spelling of 378645081 in words is "three hundred seventy-eight million, six hundred forty-five thousand, eighty-one".