378861665530 has 8 divisors (see below), whose sum is σ = 681950997972. Its totient is φ = 151544666208.

The previous prime is 378861665489. The next prime is 378861665531. The reversal of 378861665530 is 35566168873.

It can be written as a sum of positive squares in 2 ways, for example, as 349468963281 + 29392702249 = 591159^2 + 171443^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (378861665531) 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, 18943083267 + ... + 18943083286.

Almost surely, 2^378861665530 is an apocalyptic number.

378861665530 is a deficient number, since it is larger than the sum of its proper divisors (303089332442).

378861665530 is a wasteful number, since it uses less digits than its factorization.

378861665530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37886166560.

The product of its (nonzero) digits is 21772800, while the sum is 58.

The spelling of 378861665530 in words is "three hundred seventy-eight billion, eight hundred sixty-one million, six hundred sixty-five thousand, five hundred thirty".