381685621475 has 12 divisors (see below), whose sum is σ = 474358559496. Its totient is φ = 304659214080.

The previous prime is 381685621463. The next prime is 381685621481. The reversal of 381685621475 is 574126586183.

It is not a de Polignac number, because 381685621475 - 2⁶ = 381685621411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381685621475.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17220782 + ... + 17242931.

It is an arithmetic number, because the mean of its divisors is an integer number (39529879958).

Almost surely, 2^381685621475 is an apocalyptic number.

381685621475 is a deficient number, since it is larger than the sum of its proper divisors (92672938021).

381685621475 is a wasteful number, since it uses less digits than its factorization.

381685621475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34464166 (or 34464161 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 56.

The spelling of 381685621475 in words is "three hundred eighty-one billion, six hundred eighty-five million, six hundred twenty-one thousand, four hundred seventy-five".