16028494561 has 8 divisors (see below), whose sum is σ = 16692489000. Its totient is φ = 15371919360.

The previous prime is 16028494543. The next prime is 16028494567. The reversal of 16028494561 is 16549482061.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 342435025 + 15686059536 = 18505^2 + 125244^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16028494561 - 2⁹ = 16028494049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16028494567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1850400 + ... + 1859041.

It is an arithmetic number, because the mean of its divisors is an integer number (2086561125).

Almost surely, 2^16028494561 is an apocalyptic number.

It is an amenable number.

16028494561 is a deficient number, since it is larger than the sum of its proper divisors (663994439).

16028494561 is a wasteful number, since it uses less digits than its factorization.

16028494561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3709619.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 16028494561 in words is "sixteen billion, twenty-eight million, four hundred ninety-four thousand, five hundred sixty-one".