381406451571 has 8 divisors (see below), whose sum is σ = 565046594960. Its totient is φ = 254270967696.

The previous prime is 381406451567. The next prime is 381406451609. The reversal of 381406451571 is 175154604183.

381406451571 is a `hidden beast` number, since 3 + 8 + 1 + 4 + 0 + 64 + 515 + 71 = 666.

It is not a de Polignac number, because 381406451571 - 2² = 381406451567 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381406451561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7063082410 + ... + 7063082463.

It is an arithmetic number, because the mean of its divisors is an integer number (70630824370).

Almost surely, 2^381406451571 is an apocalyptic number.

381406451571 is a deficient number, since it is larger than the sum of its proper divisors (183640143389).

381406451571 is a wasteful number, since it uses less digits than its factorization.

381406451571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14126164882 (or 14126164876 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 381406451571 in words is "three hundred eighty-one billion, four hundred six million, four hundred fifty-one thousand, five hundred seventy-one".