16532097421691 has 32 divisors (see below), whose sum is σ = 18278688365568. Its totient is φ = 14888427240960.

The previous prime is 16532097421661. The next prime is 16532097421699. The reversal of 16532097421691 is 19612479023561.

It is not a de Polignac number, because 16532097421691 - 2⁶ = 16532097421627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16532097421699) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11294456 + ... + 12673946.

It is an arithmetic number, because the mean of its divisors is an integer number (571209011424).

Almost surely, 2^{16532097421691} is an apocalyptic number.

16532097421691 is a deficient number, since it is larger than the sum of its proper divisors (1746590943877).

16532097421691 is a wasteful number, since it uses less digits than its factorization.

16532097421691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379891.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 16532097421691 in words is "sixteen trillion, five hundred thirty-two billion, ninety-seven million, four hundred twenty-one thousand, six hundred ninety-one".