381838460817313 has 4 divisors (see below), whose sum is σ = 381887685842580. Its totient is φ = 381789235792048.

The previous prime is 381838460817301. The next prime is 381838460817329. The reversal of 381838460817313 is 313718064838183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 184176709453584 + 197661751363729 = 13571172^2 + 14059223^2 .

It is a cyclic number.

It is not a de Polignac number, because 381838460817313 - 2⁴⁵ = 346654088728481 is a prime.

It is a super-2 number, since 2×381838460817313² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381838460817383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24612500998 + ... + 24612516511.

It is an arithmetic number, because the mean of its divisors is an integer number (95471921460645).

Almost surely, 2^{381838460817313} is an apocalyptic number.

It is an amenable number.

381838460817313 is a deficient number, since it is larger than the sum of its proper divisors (49225025267).

381838460817313 is an equidigital number, since it uses as much as digits as its factorization.

381838460817313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49225025266.

The product of its (nonzero) digits is 55738368, while the sum is 64.

The spelling of 381838460817313 in words is "three hundred eighty-one trillion, eight hundred thirty-eight billion, four hundred sixty million, eight hundred seventeen thousand, three hundred thirteen".