16537964515946 has 4 divisors (see below), whose sum is σ = 24806946773922. Its totient is φ = 8268982257972.

The previous prime is 16537964515927. The next prime is 16537964515981. The reversal of 16537964515946 is 64951546973561.

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., 16532315340025 + 5649175921 = 4065995^2 + 75161^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16537964515946.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4134491128985 + ... + 4134491128988.

Almost surely, 2^{16537964515946} is an apocalyptic number.

16537964515946 is a deficient number, since it is larger than the sum of its proper divisors (8268982257976).

16537964515946 is an equidigital number, since it uses as much as digits as its factorization.

16537964515946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8268982257975.

The product of its digits is 734832000, while the sum is 71.

The spelling of 16537964515946 in words is "sixteen trillion, five hundred thirty-seven billion, nine hundred sixty-four million, five hundred fifteen thousand, nine hundred forty-six".