381531796445 has 8 divisors (see below), whose sum is σ = 464109911736. Its totient is φ = 301044266496.

The previous prime is 381531796441. The next prime is 381531796453. The reversal of 381531796445 is 544697135183.

It can be written as a sum of positive squares in 4 ways, for example, as 98893896676 + 282637899769 = 314474^2 + 531637^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 381531796445 - 2² = 381531796441 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 (381531796441) 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, 522645932 + ... + 522646661.

It is an arithmetic number, because the mean of its divisors is an integer number (58013738967).

Almost surely, 2^381531796445 is an apocalyptic number.

It is an amenable number.

381531796445 is a deficient number, since it is larger than the sum of its proper divisors (82578115291).

381531796445 is a wasteful number, since it uses less digits than its factorization.

381531796445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045292671.

The product of its digits is 10886400, while the sum is 56.

The spelling of 381531796445 in words is "three hundred eighty-one billion, five hundred thirty-one million, seven hundred ninety-six thousand, four hundred forty-five".