16357449769 has 8 divisors (see below), whose sum is σ = 16807514760. Its totient is φ = 15907804416.

The previous prime is 16357449763. The next prime is 16357449781. The reversal of 16357449769 is 96794475361.

It can be written as a sum of positive squares in 4 ways, for example, as 4717629225 + 11639820544 = 68685^2 + 107888^2 .

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 16357449769 - 2³ = 16357449761 is a prime.

It is a super-2 number, since 2×16357449769² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16357449761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25054 + ... + 182599.

It is an arithmetic number, because the mean of its divisors is an integer number (2100939345).

Almost surely, 2^16357449769 is an apocalyptic number.

It is an amenable number.

16357449769 is a deficient number, since it is larger than the sum of its proper divisors (450064991).

16357449769 is a wasteful number, since it uses less digits than its factorization.

16357449769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209819.

The product of its digits is 34292160, while the sum is 61.

The spelling of 16357449769 in words is "sixteen billion, three hundred fifty-seven million, four hundred forty-nine thousand, seven hundred sixty-nine".