381843307761 has 8 divisors (see below), whose sum is σ = 509131700640. Its totient is φ = 254558560032.

The previous prime is 381843307757. The next prime is 381843307771. The reversal of 381843307761 is 167703348183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 381843307761 - 2² = 381843307757 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381843307721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656700 + ... + 1093133.

It is an arithmetic number, because the mean of its divisors is an integer number (63641462580).

Almost surely, 2^381843307761 is an apocalyptic number.

It is an amenable number.

381843307761 is a deficient number, since it is larger than the sum of its proper divisors (127288392879).

381843307761 is a wasteful number, since it uses less digits than its factorization.

381843307761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822575.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 381843307761 in words is "three hundred eighty-one billion, eight hundred forty-three million, three hundred seven thousand, seven hundred sixty-one".