380618021905 has 16 divisors (see below), whose sum is σ = 511730178624. Its totient is φ = 269331670080.

The previous prime is 380618021893. The next prime is 380618021909. The reversal of 380618021905 is 509120816083.

It is not a de Polignac number, because 380618021905 - 2¹⁵ = 380617989137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (380618021909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93515907 + ... + 93519976.

It is an arithmetic number, because the mean of its divisors is an integer number (31983136164).

Almost surely, 2^380618021905 is an apocalyptic number.

It is an amenable number.

380618021905 is a deficient number, since it is larger than the sum of its proper divisors (131112156719).

380618021905 is a wasteful number, since it uses less digits than its factorization.

380618021905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187035936.

The product of its (nonzero) digits is 103680, while the sum is 43.

Adding to 380618021905 its reverse (509120816083), we get a palindrome (889738837988).

The spelling of 380618021905 in words is "three hundred eighty billion, six hundred eighteen million, twenty-one thousand, nine hundred five".