378231877447 has 2 divisors, whose sum is σ = 378231877448. Its totient is φ = 378231877446.

The previous prime is 378231877369. The next prime is 378231877453. The reversal of 378231877447 is 744778132873.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378231877447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378231877547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189115938723 + 189115938724.

It is an arithmetic number, because the mean of its divisors is an integer number (189115938724).

Almost surely, 2^378231877447 is an apocalyptic number.

378231877447 is a deficient number, since it is larger than the sum of its proper divisors (1).

378231877447 is an equidigital number, since it uses as much as digits as its factorization.

378231877447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44255232, while the sum is 61.

The spelling of 378231877447 in words is "three hundred seventy-eight billion, two hundred thirty-one million, eight hundred seventy-seven thousand, four hundred forty-seven".