16450128778574 has 4 divisors (see below), whose sum is σ = 24675193167864. Its totient is φ = 8225064389286.

The previous prime is 16450128778537. The next prime is 16450128778583. The reversal of 16450128778574 is 47587782105461.

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

It is a super-2 number, since 2×16450128778574² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16450128778574.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4112532194642 + ... + 4112532194645.

It is an arithmetic number, because the mean of its divisors is an integer number (6168798291966).

Almost surely, 2^{16450128778574} is an apocalyptic number.

16450128778574 is a deficient number, since it is larger than the sum of its proper divisors (8225064389290).

16450128778574 is an equidigital number, since it uses as much as digits as its factorization.

16450128778574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8225064389289.

The product of its (nonzero) digits is 105369600, while the sum is 65.

The spelling of 16450128778574 in words is "sixteen trillion, four hundred fifty billion, one hundred twenty-eight million, seven hundred seventy-eight thousand, five hundred seventy-four".