1681634142 has 16 divisors (see below), whose sum is σ = 3736964880. Its totient is φ = 560544696.

The previous prime is 1681634113. The next prime is 1681634173. The reversal of 1681634142 is 2414361861.

1681634142 is a `hidden beast` number, since 1 + 6 + 8 + 1 + 634 + 14 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1681634097 and 1681634106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15570633 + ... + 15570740.

It is an arithmetic number, because the mean of its divisors is an integer number (233560305).

Almost surely, 2^1681634142 is an apocalyptic number.

1681634142 is an abundant number, since it is smaller than the sum of its proper divisors (2055330738).

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

1681634142 is a wasteful number, since it uses less digits than its factorization.

1681634142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31141384 (or 31141378 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 1681634142 is about 41007.7327098195. The cubic root of 1681634142 is about 1189.1697105863.

The spelling of 1681634142 in words is "one billion, six hundred eighty-one million, six hundred thirty-four thousand, one hundred forty-two".