349719666628 has 12 divisors (see below), whose sum is σ = 623556764460. Its totient is φ = 171560591072.

The previous prime is 349719666619. The next prime is 349719666661. The reversal of 349719666628 is 826666917943.

It can be written as a sum of positive squares in 2 ways, for example, as 283345419204 + 66374247424 = 532302^2 + 257632^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824810323 + ... + 824810746.

It is an arithmetic number, because the mean of its divisors is an integer number (51963063705).

Almost surely, 2^349719666628 is an apocalyptic number.

It is an amenable number.

349719666628 is a deficient number, since it is larger than the sum of its proper divisors (273837097832).

349719666628 is a wasteful number, since it uses less digits than its factorization.

349719666628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649621126 (or 1649621124 counting only the distinct ones).

The product of its digits is 141087744, while the sum is 67.

The spelling of 349719666628 in words is "three hundred forty-nine billion, seven hundred nineteen million, six hundred sixty-six thousand, six hundred twenty-eight".