380140637646 has 128 divisors (see below), whose sum is σ = 951291740160. Its totient is φ = 98383507200.

The previous prime is 380140637593. The next prime is 380140637663. The reversal of 380140637646 is 646736041083.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 380140637595 and 380140637604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 287766666 + ... + 287767986.

It is an arithmetic number, because the mean of its divisors is an integer number (7431966720).

Almost surely, 2^380140637646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 380140637646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (475645870080).

380140637646 is an abundant number, since it is smaller than the sum of its proper divisors (571151102514).

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

380140637646 is a wasteful number, since it uses less digits than its factorization.

380140637646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110.

The product of its (nonzero) digits is 1741824, while the sum is 48.

The spelling of 380140637646 in words is "three hundred eighty billion, one hundred forty million, six hundred thirty-seven thousand, six hundred forty-six".