381923564793 has 4 divisors (see below), whose sum is σ = 509231419728. Its totient is φ = 254615709860.

The previous prime is 381923564779. The next prime is 381923564837. The reversal of 381923564793 is 397465329183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 381923564793 - 2²² = 381919370489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381923564713) 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, 63653927463 + ... + 63653927468.

It is an arithmetic number, because the mean of its divisors is an integer number (127307854932).

Almost surely, 2^381923564793 is an apocalyptic number.

It is an amenable number.

381923564793 is a deficient number, since it is larger than the sum of its proper divisors (127307854935).

381923564793 is a wasteful number, since it uses less digits than its factorization.

381923564793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127307854934.

The product of its digits is 29393280, while the sum is 60.

The spelling of 381923564793 in words is "three hundred eighty-one billion, nine hundred twenty-three million, five hundred sixty-four thousand, seven hundred ninety-three".