381821652922 has 8 divisors (see below), whose sum is σ = 586701564372. Its totient is φ = 186254464800.

The previous prime is 381821652857. The next prime is 381821652923. The reversal of 381821652922 is 229256128183.

It can be written as a sum of positive squares in 2 ways, for example, as 372501488241 + 9320164681 = 610329^2 + 96541^2 .

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

It is a super-2 number, since 2×381821652922² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (381821652923) 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, 2328180729 + ... + 2328180892.

Almost surely, 2^381821652922 is an apocalyptic number.

381821652922 is a deficient number, since it is larger than the sum of its proper divisors (204879911450).

381821652922 is a wasteful number, since it uses less digits than its factorization.

381821652922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4656361664.

The product of its digits is 829440, while the sum is 49.

The spelling of 381821652922 in words is "three hundred eighty-one billion, eight hundred twenty-one million, six hundred fifty-two thousand, nine hundred twenty-two".