1686142554 has 32 divisors (see below), whose sum is σ = 3397718016. Its totient is φ = 557819760.

The previous prime is 1686142553. The next prime is 1686142559. The reversal of 1686142554 is 4552416861.

It is not an unprimeable number, because it can be changed into a prime (1686142553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1232779 + ... + 1234145.

It is an arithmetic number, because the mean of its divisors is an integer number (106178688).

Almost surely, 2^1686142554 is an apocalyptic number.

1686142554 is an abundant number, since it is smaller than the sum of its proper divisors (1711575462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1686142554 is a wasteful number, since it uses less digits than its factorization.

1686142554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770.

The product of its digits is 230400, while the sum is 42.

The square root of 1686142554 is about 41062.6661823121. Note that the first 3 decimals coincide. The cubic root of 1686142554 is about 1190.2314720499.

The spelling of 1686142554 in words is "one billion, six hundred eighty-six million, one hundred forty-two thousand, five hundred fifty-four".