381166322688 has 66 divisors (see below), whose sum is σ = 1100609511534. Its totient is φ = 127055437824.

The previous prime is 381166322651. The next prime is 381166322707. The reversal of 381166322688 is 886223661183.

381166322688 is a `hidden beast` number, since 3 + 81 + 166 + 322 + 6 + 88 = 666.

It can be written as a sum of positive squares in only one way, i.e., 369041670144 + 12124652544 = 607488^2 + 110112^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20670381 + ... + 20688812.

Almost surely, 2^381166322688 is an apocalyptic number.

It is an amenable number.

381166322688 is an abundant number, since it is smaller than the sum of its proper divisors (719443188846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381166322688 is a wasteful number, since it uses less digits than its factorization.

381166322688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41359219 (or 41359198 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The spelling of 381166322688 in words is "three hundred eighty-one billion, one hundred sixty-six million, three hundred twenty-two thousand, six hundred eighty-eight".