380400784664 has 8 divisors (see below), whose sum is σ = 713251471260. Its totient is φ = 190200392328.

The previous prime is 380400784661. The next prime is 380400784697. The reversal of 380400784664 is 466487004083.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380400784661) 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 as a sum of consecutive naturals, namely, 23775049034 + ... + 23775049049.

Almost surely, 2^380400784664 is an apocalyptic number.

It is an amenable number.

380400784664 is a deficient number, since it is larger than the sum of its proper divisors (332850686596).

380400784664 is a wasteful number, since it uses less digits than its factorization.

380400784664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47550098089 (or 47550098085 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 50.

The spelling of 380400784664 in words is "three hundred eighty billion, four hundred million, seven hundred eighty-four thousand, six hundred sixty-four".