16171491901 has 16 divisors (see below), whose sum is σ = 16665916608. Its totient is φ = 15682867200.

The previous prime is 16171491887. The next prime is 16171491929. The reversal of 16171491901 is 10919417161.

It is a cyclic number.

It is not a de Polignac number, because 16171491901 - 2⁷ = 16171491773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16171491971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3655671 + ... + 3660091.

It is an arithmetic number, because the mean of its divisors is an integer number (1041619788).

Almost surely, 2^16171491901 is an apocalyptic number.

It is an amenable number.

16171491901 is a deficient number, since it is larger than the sum of its proper divisors (494424707).

16171491901 is a wasteful number, since it uses less digits than its factorization.

16171491901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5052.

The product of its (nonzero) digits is 13608, while the sum is 40.

The spelling of 16171491901 in words is "sixteen billion, one hundred seventy-one million, four hundred ninety-one thousand, nine hundred one".