381695779141 has 4 divisors (see below), whose sum is σ = 386294523552. Its totient is φ = 377097034732.

The previous prime is 381695779103. The next prime is 381695779159. The reversal of 381695779141 is 141977596183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 141977596183 = 409 ⋅347133487.

It is a cyclic number.

It is not a de Polignac number, because 381695779141 - 2¹⁵ = 381695746373 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 381695779141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381695479141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2299372081 + ... + 2299372246.

It is an arithmetic number, because the mean of its divisors is an integer number (96573630888).

Almost surely, 2^381695779141 is an apocalyptic number.

It is an amenable number.

381695779141 is a deficient number, since it is larger than the sum of its proper divisors (4598744411).

381695779141 is an equidigital number, since it uses as much as digits as its factorization.

381695779141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4598744410.

The product of its digits is 11430720, while the sum is 61.

The spelling of 381695779141 in words is "three hundred eighty-one billion, six hundred ninety-five million, seven hundred seventy-nine thousand, one hundred forty-one".