381993680577 has 4 divisors (see below), whose sum is σ = 509324907440. Its totient is φ = 254662453716.

The previous prime is 381993680569. The next prime is 381993680587. The reversal of 381993680577 is 775086399183.

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 not a de Polignac number, because 381993680577 - 2³ = 381993680569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381993680527) 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, 63665613427 + ... + 63665613432.

It is an arithmetic number, because the mean of its divisors is an integer number (127331226860).

Almost surely, 2^381993680577 is an apocalyptic number.

It is an amenable number.

381993680577 is a deficient number, since it is larger than the sum of its proper divisors (127331226863).

381993680577 is a wasteful number, since it uses less digits than its factorization.

381993680577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127331226862.

The product of its (nonzero) digits is 68584320, while the sum is 66.

The spelling of 381993680577 in words is "three hundred eighty-one billion, nine hundred ninety-three million, six hundred eighty thousand, five hundred seventy-seven".