381231616745 has 32 divisors (see below), whose sum is σ = 527007050496. Its totient is φ = 259336627200.

The previous prime is 381231616687. The next prime is 381231616783. The reversal of 381231616745 is 547616132183.

It is not a de Polignac number, because 381231616745 - 2⁶ = 381231616681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 381231616745.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2147165 + ... + 2317925.

It is an arithmetic number, because the mean of its divisors is an integer number (16468970328).

Almost surely, 2^381231616745 is an apocalyptic number.

381231616745 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

381231616745 is a deficient number, since it is larger than the sum of its proper divisors (145775433751).

381231616745 is a wasteful number, since it uses less digits than its factorization.

381231616745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171281.

The product of its digits is 725760, while the sum is 47.

The spelling of 381231616745 in words is "three hundred eighty-one billion, two hundred thirty-one million, six hundred sixteen thousand, seven hundred forty-five".