381576520228 has 12 divisors (see below), whose sum is σ = 670169594332. Its totient is φ = 190099493280.

The previous prime is 381576520219. The next prime is 381576520229. The reversal of 381576520228 is 822025675183.

It can be written as a sum of positive squares in 2 ways, for example, as 257554220004 + 124022300224 = 507498^2 + 352168^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (381576520229) 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, 172190463 + ... + 172192678.

Almost surely, 2^381576520228 is an apocalyptic number.

It is an amenable number.

381576520228 is a deficient number, since it is larger than the sum of its proper divisors (288593074104).

381576520228 is a wasteful number, since it uses less digits than its factorization.

381576520228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344383422 (or 344383420 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 381576520228 in words is "three hundred eighty-one billion, five hundred seventy-six million, five hundred twenty thousand, two hundred twenty-eight".