381766305645 has 48 divisors (see below), whose sum is σ = 697623788160. Its totient is φ = 192596773248.

The previous prime is 381766305637. The next prime is 381766305659. The reversal of 381766305645 is 546503667183.

381766305645 is a `hidden beast` number, since 3 + 8 + 1 + 76 + 6 + 3 + 0 + 564 + 5 = 666.

381766305645 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 381766305645 - 2³ = 381766305637 is a prime.

It is a super-3 number, since 3×381766305645³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381766305591 and 381766305600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 216424 + ... + 900206.

It is an arithmetic number, because the mean of its divisors is an integer number (14533828920).

Almost surely, 2^381766305645 is an apocalyptic number.

It is an amenable number.

381766305645 is a deficient number, since it is larger than the sum of its proper divisors (315857482515).

381766305645 is a wasteful number, since it uses less digits than its factorization.

381766305645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684466 (or 684463 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 381766305645 in words is "three hundred eighty-one billion, seven hundred sixty-six million, three hundred five thousand, six hundred forty-five".