16515151697 has 6 divisors (see below), whose sum is σ = 18153018114. Its totient is φ = 15013774160.

The previous prime is 16515151691. The next prime is 16515151727. The reversal of 16515151697 is 79615151561.

16515151697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 15888350401 + 626801296 = 126049^2 + 25036^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16515151697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16515151691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68244308 + ... + 68244549.

It is an arithmetic number, because the mean of its divisors is an integer number (3025503019).

Almost surely, 2^16515151697 is an apocalyptic number.

It is an amenable number.

16515151697 is a deficient number, since it is larger than the sum of its proper divisors (1637866417).

16515151697 is a wasteful number, since it uses less digits than its factorization.

16515151697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136488879 (or 136488868 counting only the distinct ones).

The product of its digits is 283500, while the sum is 47.

The spelling of 16515151697 in words is "sixteen billion, five hundred fifteen million, one hundred fifty-one thousand, six hundred ninety-seven".