381664345245 has 16 divisors (see below), whose sum is σ = 620673821952. Its totient is φ = 200217360960.

The previous prime is 381664345243. The next prime is 381664345253. The reversal of 381664345245 is 542543466183.

It is not a de Polignac number, because 381664345245 - 2¹ = 381664345243 is a prime.

It is a super-2 number, since 2×381664345245² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381664345243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208558837 + ... + 208560666.

It is an arithmetic number, because the mean of its divisors is an integer number (38792113872).

Almost surely, 2^381664345245 is an apocalyptic number.

It is an amenable number.

381664345245 is a deficient number, since it is larger than the sum of its proper divisors (239009476707).

381664345245 is a wasteful number, since it uses less digits than its factorization.

381664345245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417119572.

The product of its digits is 8294400, while the sum is 51.

The spelling of 381664345245 in words is "three hundred eighty-one billion, six hundred sixty-four million, three hundred forty-five thousand, two hundred forty-five".