16591406217916 has 12 divisors (see below), whose sum is σ = 29819689554088. Its totient is φ = 8071494916752.

The previous prime is 16591406217913. The next prime is 16591406217917. The reversal of 16591406217916 is 61971260419561.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16591406217913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56052047886 + ... + 56052048181.

Almost surely, 2^{16591406217916} is an apocalyptic number.

It is an amenable number.

16591406217916 is a deficient number, since it is larger than the sum of its proper divisors (13228283336172).

16591406217916 is a wasteful number, since it uses less digits than its factorization.

16591406217916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112104096108 (or 112104096106 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 16591406217916 in words is "sixteen trillion, five hundred ninety-one billion, four hundred six million, two hundred seventeen thousand, nine hundred sixteen".