406045781566 has 4 divisors (see below), whose sum is σ = 609068672352. Its totient is φ = 203022890782.

The previous prime is 406045781437. The next prime is 406045781573. The reversal of 406045781566 is 665187540604.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 101511445390 + ... + 101511445393.

It is an arithmetic number, because the mean of its divisors is an integer number (152267168088).

Almost surely, 2^406045781566 is an apocalyptic number.

406045781566 is a deficient number, since it is larger than the sum of its proper divisors (203022890786).

406045781566 is a wasteful number, since it uses less digits than its factorization.

406045781566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203022890785.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 406045781566 in words is "four hundred six billion, forty-five million, seven hundred eighty-one thousand, five hundred sixty-six".