16161511516162 has 4 divisors (see below), whose sum is σ = 24242267274246. Its totient is φ = 8080755758080.

The previous prime is 16161511516123. The next prime is 16161511516219. The reversal of 16161511516162 is 26161511516161.

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

It can be written as a sum of positive squares in only one way, i.e., 11599276104441 + 4562235411721 = 3405771^2 + 2135939^2 .

It is a super-2 number, since 2×16161511516162² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4040377879039 + ... + 4040377879042.

Almost surely, 2^{16161511516162} is an apocalyptic number.

16161511516162 is a deficient number, since it is larger than the sum of its proper divisors (8080755758084).

16161511516162 is an equidigital number, since it uses as much as digits as its factorization.

16161511516162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8080755758083.

The product of its digits is 64800, while the sum is 43.

Subtracting 16161511516162 from its reverse (26161511516161), we obtain a palindrome (9999999999999).

It can be divided in two parts, 1616151 and 1516162, that added together give a palindrome (3132313).

The spelling of 16161511516162 in words is "sixteen trillion, one hundred sixty-one billion, five hundred eleven million, five hundred sixteen thousand, one hundred sixty-two".