381144598691 has 4 divisors (see below), whose sum is σ = 384845031792. Its totient is φ = 377444165592.

The previous prime is 381144598673. The next prime is 381144598697. The reversal of 381144598691 is 196895441183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381144598691 is a prime.

It is a super-2 number, since 2×381144598691² (a number of 24 digits) contains 22 as substring.

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 381144598691.

It is not an unprimeable number, because it can be changed into a prime (381144598697) 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, 1850216396 + ... + 1850216601.

It is an arithmetic number, because the mean of its divisors is an integer number (96211257948).

Almost surely, 2^381144598691 is an apocalyptic number.

381144598691 is a deficient number, since it is larger than the sum of its proper divisors (3700433101).

381144598691 is a wasteful number, since it uses less digits than its factorization.

381144598691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3700433100.

The product of its digits is 7464960, while the sum is 59.

The spelling of 381144598691 in words is "three hundred eighty-one billion, one hundred forty-four million, five hundred ninety-eight thousand, six hundred ninety-one".