381611633 has 24 divisors (see below), whose sum is σ = 424091520. Its totient is φ = 343137600.

The previous prime is 381611623. The next prime is 381611639. The reversal of 381611633 is 336116183.

It is not a de Polignac number, because 381611633 - 2¹⁰ = 381610609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381611633.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381611639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1348310 + ... + 1348592.

It is an arithmetic number, because the mean of its divisors is an integer number (17670480).

Almost surely, 2^381611633 is an apocalyptic number.

It is an amenable number.

381611633 is a deficient number, since it is larger than the sum of its proper divisors (42479887).

381611633 is a wasteful number, since it uses less digits than its factorization.

381611633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 476 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 381611633 is about 19534.8824670127. The cubic root of 381611633 is about 725.3381746960.

The spelling of 381611633 in words is "three hundred eighty-one million, six hundred eleven thousand, six hundred thirty-three".