381461544647 has 4 divisors (see below), whose sum is σ = 403900459056. Its totient is φ = 359022630240.

The previous prime is 381461544599. The next prime is 381461544707. The reversal of 381461544647 is 746445164183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381461544647 - 2²² = 381457350343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381461574647) 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, 11219457179 + ... + 11219457212.

It is an arithmetic number, because the mean of its divisors is an integer number (100975114764).

Almost surely, 2^381461544647 is an apocalyptic number.

381461544647 is a deficient number, since it is larger than the sum of its proper divisors (22438914409).

381461544647 is a wasteful number, since it uses less digits than its factorization.

381461544647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22438914408.

The product of its digits is 7741440, while the sum is 53.

The spelling of 381461544647 in words is "three hundred eighty-one billion, four hundred sixty-one million, five hundred forty-four thousand, six hundred forty-seven".