381275558647 has 2 divisors, whose sum is σ = 381275558648. Its totient is φ = 381275558646.

The previous prime is 381275558563. The next prime is 381275558687. The reversal of 381275558647 is 746855572183.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381275558647 - 2²⁷ = 381141340919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381275558687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190637779323 + 190637779324.

It is an arithmetic number, because the mean of its divisors is an integer number (190637779324).

Almost surely, 2^381275558647 is an apocalyptic number.

381275558647 is a deficient number, since it is larger than the sum of its proper divisors (1).

381275558647 is an equidigital number, since it uses as much as digits as its factorization.

381275558647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448000, while the sum is 61.

The spelling of 381275558647 in words is "three hundred eighty-one billion, two hundred seventy-five million, five hundred fifty-eight thousand, six hundred forty-seven".