381647087815 has 16 divisors (see below), whose sum is σ = 554190057792. Its totient is φ = 246306691584.

The previous prime is 381647087779. The next prime is 381647087819. The reversal of 381647087815 is 518780746183.

It is a cyclic number.

It is not a de Polignac number, because 381647087815 - 2¹⁵ = 381647055047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381647087815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381647087819) 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, 320711244 + ... + 320712433.

It is an arithmetic number, because the mean of its divisors is an integer number (34636878612).

Almost surely, 2^381647087815 is an apocalyptic number.

381647087815 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

381647087815 is a deficient number, since it is larger than the sum of its proper divisors (172542969977).

381647087815 is a wasteful number, since it uses less digits than its factorization.

381647087815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641423706.

The product of its (nonzero) digits is 9031680, while the sum is 58.

The spelling of 381647087815 in words is "three hundred eighty-one billion, six hundred forty-seven million, eighty-seven thousand, eight hundred fifteen".