381815727655 has 32 divisors (see below), whose sum is σ = 469848314880. Its totient is φ = 297775242240.

The previous prime is 381815727583. The next prime is 381815727691. The reversal of 381815727655 is 556727518183.

It is not a de Polignac number, because 381815727655 - 2¹³ = 381815719463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381815727655.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43349262 + ... + 43358068.

It is an arithmetic number, because the mean of its divisors is an integer number (14682759840).

Almost surely, 2^381815727655 is an apocalyptic number.

381815727655 is a deficient number, since it is larger than the sum of its proper divisors (88032587225).

381815727655 is a wasteful number, since it uses less digits than its factorization.

381815727655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10239.

The product of its digits is 14112000, while the sum is 58.

The spelling of 381815727655 in words is "three hundred eighty-one billion, eight hundred fifteen million, seven hundred twenty-seven thousand, six hundred fifty-five".