3781947822566 has 8 divisors (see below), whose sum is σ = 5673482828544. Its totient is φ = 1890786879720.

The previous prime is 3781947822539. The next prime is 3781947822599. The reversal of 3781947822566 is 6652287491873.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×3781947822566² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3781947822496 and 3781947822505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93490505 + ... + 93530948.

It is an arithmetic number, because the mean of its divisors is an integer number (709185353568).

Almost surely, 2^{3781947822566} is an apocalyptic number.

3781947822566 is a deficient number, since it is larger than the sum of its proper divisors (1891535005978).

3781947822566 is a wasteful number, since it uses less digits than its factorization.

3781947822566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187031566.

The product of its digits is 243855360, while the sum is 68.

The spelling of 3781947822566 in words is "three trillion, seven hundred eighty-one billion, nine hundred forty-seven million, eight hundred twenty-two thousand, five hundred sixty-six".