401566814909616 has 80 divisors (see below), whose sum is σ = 1038534868800000. Its totient is φ = 133706732404224.

The previous prime is 401566814909599. The next prime is 401566814909633. The reversal of 401566814909616 is 616909418665104.

It is an interprime number because it is at equal distance from previous prime (401566814909599) and next prime (401566814909633).

It is a super-2 number, since 2×401566814909616² (a number of 30 digits) contains 22 as substring.

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, 605350885 + ... + 606013883.

It is an arithmetic number, because the mean of its divisors is an integer number (12981685860000).

Almost surely, 2^{401566814909616} is an apocalyptic number.

It is an amenable number.

401566814909616 is an abundant number, since it is smaller than the sum of its proper divisors (636968053890384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401566814909616 is a wasteful number, since it uses less digits than its factorization.

401566814909616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677026 (or 677020 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 66.

The spelling of 401566814909616 in words is "four hundred one trillion, five hundred sixty-six billion, eight hundred fourteen million, nine hundred nine thousand, six hundred sixteen".