401216237566 has 32 divisors (see below), whose sum is σ = 631227437568. Its totient is φ = 190898796000.

The previous prime is 401216237507. The next prime is 401216237641. The reversal of 401216237566 is 665732612104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10106031 + ... + 10145653.

It is an arithmetic number, because the mean of its divisors is an integer number (19725857424).

Almost surely, 2^401216237566 is an apocalyptic number.

401216237566 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

401216237566 is a deficient number, since it is larger than the sum of its proper divisors (230011200002).

401216237566 is a wasteful number, since it uses less digits than its factorization.

401216237566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40776.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 401216237566 in words is "four hundred one billion, two hundred sixteen million, two hundred thirty-seven thousand, five hundred sixty-six".