16474368857 has 8 divisors (see below), whose sum is σ = 17515833192. Its totient is φ = 15440947200.

The previous prime is 16474368839. The next prime is 16474368899. The reversal of 16474368857 is 75886347461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7115934736 + 9358434121 = 84356^2 + 96739^2 .

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 16474368857 - 2¹² = 16474364761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16474368796 and 16474368805.

It is not an unprimeable number, because it can be changed into a prime (16474668857) 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, 2006444 + ... + 2014637.

It is an arithmetic number, because the mean of its divisors is an integer number (2189479149).

Almost surely, 2^16474368857 is an apocalyptic number.

16474368857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16474368857 is a deficient number, since it is larger than the sum of its proper divisors (1041464335).

16474368857 is a wasteful number, since it uses less digits than its factorization.

16474368857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021339.

The product of its digits is 27095040, while the sum is 59.

The spelling of 16474368857 in words is "sixteen billion, four hundred seventy-four million, three hundred sixty-eight thousand, eight hundred fifty-seven".