16428749485 has 8 divisors (see below), whose sum is σ = 19796303736. Its totient is φ = 13088463360.

The previous prime is 16428749461. The next prime is 16428749489. The reversal of 16428749485 is 58494782461.

It can be written as a sum of positive squares in 4 ways, for example, as 1256915209 + 15171834276 = 35453^2 + 123174^2 .

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

It is not a de Polignac number, because 16428749485 - 2⁵ = 16428749453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16428749489) 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, 6815704 + ... + 6818113.

It is an arithmetic number, because the mean of its divisors is an integer number (2474537967).

Almost surely, 2^16428749485 is an apocalyptic number.

It is an amenable number.

16428749485 is a deficient number, since it is larger than the sum of its proper divisors (3367554251).

16428749485 is a wasteful number, since it uses less digits than its factorization.

16428749485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13634063.

The product of its digits is 15482880, while the sum is 58.

The spelling of 16428749485 in words is "sixteen billion, four hundred twenty-eight million, seven hundred forty-nine thousand, four hundred eighty-five".