381617432766 has 12 divisors (see below), whose sum is σ = 826837771032. Its totient is φ = 127205810916.

The previous prime is 381617432719. The next prime is 381617432803. The reversal of 381617432766 is 667234716183.

It is a happy number.

381617432766 is a `hidden beast` number, since 3 + 81 + 61 + 7 + 432 + 76 + 6 = 666.

It is a congruent number.

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, 10600484226 + ... + 10600484261.

It is an arithmetic number, because the mean of its divisors is an integer number (68903147586).

Almost surely, 2^381617432766 is an apocalyptic number.

381617432766 is an abundant number, since it is smaller than the sum of its proper divisors (445220338266).

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

381617432766 is a wasteful number, since it uses less digits than its factorization.

381617432766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21200968495 (or 21200968492 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The spelling of 381617432766 in words is "three hundred eighty-one billion, six hundred seventeen million, four hundred thirty-two thousand, seven hundred sixty-six".