379743867581 has 16 divisors (see below), whose sum is σ = 414248068080. Its totient is φ = 346009128960.

The previous prime is 379743867553. The next prime is 379743867619. The reversal of 379743867581 is 185768347973.

It can be written as a sum of positive squares in 8 ways, for example, as 127799100100 + 251944767481 = 357490^2 + 501941^2 .

It is a cyclic number.

It is not a de Polignac number, because 379743867581 - 2²² = 379739673277 is a prime.

It is a super-2 number, since 2×379743867581² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (379743867281) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 409361 + ... + 962841.

It is an arithmetic number, because the mean of its divisors is an integer number (25890504255).

Almost surely, 2^379743867581 is an apocalyptic number.

It is an amenable number.

379743867581 is a deficient number, since it is larger than the sum of its proper divisors (34504200499).

379743867581 is a wasteful number, since it uses less digits than its factorization.

379743867581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554176.

The product of its digits is 213373440, while the sum is 68.

The spelling of 379743867581 in words is "three hundred seventy-nine billion, seven hundred forty-three million, eight hundred sixty-seven thousand, five hundred eighty-one".