16017693997 has 4 divisors (see below), whose sum is σ = 16019225820. Its totient is φ = 16016162176.

The previous prime is 16017693941. The next prime is 16017694009. The reversal of 16017693997 is 79939671061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6378577956 + 9639116041 = 79866^2 + 98179^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16017693997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16017693697) 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, 750118 + ... + 771175.

It is an arithmetic number, because the mean of its divisors is an integer number (4004806455).

Almost surely, 2^16017693997 is an apocalyptic number.

It is an amenable number.

16017693997 is a deficient number, since it is larger than the sum of its proper divisors (1531823).

16017693997 is a wasteful number, since it uses less digits than its factorization.

16017693997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531822.

The product of its (nonzero) digits is 3857868, while the sum is 58.

The spelling of 16017693997 in words is "sixteen billion, seventeen million, six hundred ninety-three thousand, nine hundred ninety-seven".