381821471780 has 48 divisors (see below), whose sum is σ = 917210300160. Its totient is φ = 130790395008.

The previous prime is 381821471777. The next prime is 381821471783. The reversal of 381821471780 is 87174128183.

It is an interprime number because it is at equal distance from previous prime (381821471777) and next prime (381821471783).

It is not an unprimeable number, because it can be changed into a prime (381821471783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1094600 + ... + 1400639.

It is an arithmetic number, because the mean of its divisors is an integer number (19108547920).

Almost surely, 2^381821471780 is an apocalyptic number.

It is an amenable number.

381821471780 is an abundant number, since it is smaller than the sum of its proper divisors (535388828380).

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

381821471780 is a wasteful number, since it uses less digits than its factorization.

381821471780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496348 (or 2496346 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 50.

The spelling of 381821471780 in words is "three hundred eighty-one billion, eight hundred twenty-one million, four hundred seventy-one thousand, seven hundred eighty".