378621655747 has 2 divisors, whose sum is σ = 378621655748. Its totient is φ = 378621655746.

The previous prime is 378621655739. The next prime is 378621655787. The reversal of 378621655747 is 747556126873.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 378621655747 - 2³ = 378621655739 is a prime.

It is not a weakly prime, because it can be changed into another prime (378621655787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189310827873 + 189310827874.

It is an arithmetic number, because the mean of its divisors is an integer number (189310827874).

Almost surely, 2^378621655747 is an apocalyptic number.

378621655747 is a deficient number, since it is larger than the sum of its proper divisors (1).

378621655747 is an equidigital number, since it uses as much as digits as its factorization.

378621655747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59270400, while the sum is 61.

The spelling of 378621655747 in words is "three hundred seventy-eight billion, six hundred twenty-one million, six hundred fifty-five thousand, seven hundred forty-seven".