381840856418 has 64 divisors (see below), whose sum is σ = 695144540160. Its totient is φ = 153779252352.

The previous prime is 381840856409. The next prime is 381840856421. The reversal of 381840856418 is 814658048183.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4744046 + ... + 4823862.

It is an arithmetic number, because the mean of its divisors is an integer number (10861633440).

Almost surely, 2^381840856418 is an apocalyptic number.

381840856418 is a deficient number, since it is larger than the sum of its proper divisors (313303683742).

381840856418 is a wasteful number, since it uses less digits than its factorization.

381840856418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80111.

The product of its (nonzero) digits is 5898240, while the sum is 56.

The spelling of 381840856418 in words is "three hundred eighty-one billion, eight hundred forty million, eight hundred fifty-six thousand, four hundred eighteen".