28160961646 has 4 divisors (see below), whose sum is σ = 42241442472. Its totient is φ = 14080480822.

The previous prime is 28160961641. The next prime is 28160961757. The reversal of 28160961646 is 64616906182.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28160961646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28160961641) 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 as a sum of consecutive naturals, namely, 7040240410 + ... + 7040240413.

It is an arithmetic number, because the mean of its divisors is an integer number (10560360618).

Almost surely, 2^28160961646 is an apocalyptic number.

28160961646 is a deficient number, since it is larger than the sum of its proper divisors (14080480826).

28160961646 is a wasteful number, since it uses less digits than its factorization.

28160961646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14080480825.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 28160961646 in words is "twenty-eight billion, one hundred sixty million, nine hundred sixty-one thousand, six hundred forty-six".