380991207161640 has 128 divisors (see below), whose sum is σ = 1182600726278400. Its totient is φ = 98076515389440.

The previous prime is 380991207161597. The next prime is 380991207161641. The reversal of 380991207161640 is 46161702199083.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (380991207161641) 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 31 ways as a sum of consecutive naturals, for example, 9298189 + ... + 29127971.

It is an arithmetic number, because the mean of its divisors is an integer number (9239068174050).

Almost surely, 2^{380991207161640} is an apocalyptic number.

380991207161640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 380991207161640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591300363139200).

380991207161640 is an abundant number, since it is smaller than the sum of its proper divisors (801609519116760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

380991207161640 is a wasteful number, since it uses less digits than its factorization.

380991207161640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19835347 (or 19835343 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 57.

The spelling of 380991207161640 in words is "three hundred eighty trillion, nine hundred ninety-one billion, two hundred seven million, one hundred sixty-one thousand, six hundred forty".