381880661637 has 8 divisors (see below), whose sum is σ = 509178227680. Its totient is φ = 254585101680.

The previous prime is 381880661611. The next prime is 381880661677. The reversal of 381880661637 is 736166088183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 381880661637 - 2⁷ = 381880661509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381880661677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20187 + ... + 874167.

It is an arithmetic number, because the mean of its divisors is an integer number (63647278460).

Almost surely, 2^381880661637 is an apocalyptic number.

It is an amenable number.

381880661637 is a deficient number, since it is larger than the sum of its proper divisors (127297566043).

381880661637 is a wasteful number, since it uses less digits than its factorization.

381880661637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003043.

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 381880661637 in words is "three hundred eighty-one billion, eight hundred eighty million, six hundred sixty-one thousand, six hundred thirty-seven".