1686527042 has 18 divisors (see below), whose sum is σ = 2572212249. Its totient is φ = 829353840.

The previous prime is 1686527033. The next prime is 1686527071. The reversal of 1686527042 is 2407256861.

It can be written as a sum of positive squares in 2 ways, for example, as 1316310961 + 370216081 = 36281^2 + 19241^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=29039.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4123334 + ... + 4123742.

Almost surely, 2^1686527042 is an apocalyptic number.

1686527042 is a deficient number, since it is larger than the sum of its proper divisors (885685207).

1686527042 is an frugal number, since it uses more digits than its factorization.

1686527042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 1686527042 is about 41067.3476377523. The cubic root of 1686527042 is about 1190.3219339422.

The spelling of 1686527042 in words is "one billion, six hundred eighty-six million, five hundred twenty-seven thousand, forty-two".