381972542285 has 12 divisors (see below), whose sum is σ = 483761349468. Its totient is φ = 289494978048.

The previous prime is 381972542257. The next prime is 381972542327. The reversal of 381972542285 is 582245279183.

It can be written as a sum of positive squares in 2 ways, for example, as 47626078756 + 334346463529 = 218234^2 + 578227^2 .

It is not a de Polignac number, because 381972542285 - 2²⁶ = 381905433421 is a prime.

It is a super-3 number, since 3×381972542285³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

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 381972542285.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105807764 + ... + 105811373.

It is an arithmetic number, because the mean of its divisors is an integer number (40313445789).

Almost surely, 2^381972542285 is an apocalyptic number.

It is an amenable number.

381972542285 is a deficient number, since it is larger than the sum of its proper divisors (101788807183).

381972542285 is a wasteful number, since it uses less digits than its factorization.

381972542285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211619180 (or 211619161 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 56.

The spelling of 381972542285 in words is "three hundred eighty-one billion, nine hundred seventy-two million, five hundred forty-two thousand, two hundred eighty-five".