1686268637044 has 12 divisors (see below), whose sum is σ = 2952366708004. Its totient is φ = 842735291904.

The previous prime is 1686268637023. The next prime is 1686268637051. The reversal of 1686268637044 is 4407368626861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 226671210000 + 1459597427044 = 476100^2 + 1208138^2 .

It is a congruent number.

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, 99747147 + ... + 99764050.

Almost surely, 2^{1686268637044} is an apocalyptic number.

It is an amenable number.

1686268637044 is a deficient number, since it is larger than the sum of its proper divisors (1266098070960).

1686268637044 is a wasteful number, since it uses less digits than its factorization.

1686268637044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199513314 (or 199513312 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 61.

The spelling of 1686268637044 in words is "one trillion, six hundred eighty-six billion, two hundred sixty-eight million, six hundred thirty-seven thousand, forty-four".