381605019081 has 32 divisors (see below), whose sum is σ = 598725012480. Its totient is φ = 213140289600.

The previous prime is 381605019073. The next prime is 381605019083. The reversal of 381605019081 is 180910506183.

It is not a de Polignac number, because 381605019081 - 2³ = 381605019073 is a prime.

It is a super-2 number, since 2×381605019081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (381605019083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452965 + ... + 984066.

It is an arithmetic number, because the mean of its divisors is an integer number (18710156640).

Almost surely, 2^381605019081 is an apocalyptic number.

It is an amenable number.

381605019081 is a deficient number, since it is larger than the sum of its proper divisors (217119993399).

381605019081 is a wasteful number, since it uses less digits than its factorization.

381605019081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437677.

The product of its (nonzero) digits is 51840, while the sum is 42.

The spelling of 381605019081 in words is "three hundred eighty-one billion, six hundred five million, nineteen thousand, eighty-one".