381609328127 has 4 divisors (see below), whose sum is σ = 381614539920. Its totient is φ = 381604116336.

The previous prime is 381609328123. The next prime is 381609328141. The reversal of 381609328127 is 721823906183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 721823906183 = 53323 ⋅13536821.

It is a cyclic number.

It is not a de Polignac number, because 381609328127 - 2² = 381609328123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381609328123) 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, 2494478 + ... + 2643035.

It is an arithmetic number, because the mean of its divisors is an integer number (95403634980).

Almost surely, 2^381609328127 is an apocalyptic number.

381609328127 is a deficient number, since it is larger than the sum of its proper divisors (5211793).

381609328127 is an equidigital number, since it uses as much as digits as its factorization.

381609328127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5211792.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 381609328127 in words is "three hundred eighty-one billion, six hundred nine million, three hundred twenty-eight thousand, one hundred twenty-seven".