381958261983 has 6 divisors (see below), whose sum is σ = 551717489544. Its totient is φ = 254638841316.

The previous prime is 381958261963. The next prime is 381958262009. The reversal of 381958261983 is 389162859183.

381958261983 is a `hidden beast` number, since 3 + 8 + 1 + 9 + 5 + 8 + 2 + 619 + 8 + 3 = 666.

It is not a de Polignac number, because 381958261983 - 2¹⁶ = 381958196447 is a prime.

It is a super-2 number, since 2×381958261983² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 381958261983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381958261933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21219903435 + ... + 21219903452.

It is an arithmetic number, because the mean of its divisors is an integer number (91952914924).

Almost surely, 2^381958261983 is an apocalyptic number.

381958261983 is a deficient number, since it is larger than the sum of its proper divisors (169759227561).

381958261983 is a wasteful number, since it uses less digits than its factorization.

381958261983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42439806893 (or 42439806890 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 63.

The spelling of 381958261983 in words is "three hundred eighty-one billion, nine hundred fifty-eight million, two hundred sixty-one thousand, nine hundred eighty-three".