1681295634 has 24 divisors (see below), whose sum is σ = 3653258700. Its totient is φ = 558823968.

The previous prime is 1681295599. The next prime is 1681295641. The reversal of 1681295634 is 4365921861.

1681295634 is a `hidden beast` number, since 1 + 6 + 8 + 1 + 2 + 9 + 5 + 634 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1668314025 + 12981609 = 40845^2 + 3603^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1681295634.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127537 + ... + 140100.

Almost surely, 2^1681295634 is an apocalyptic number.

1681295634 is an abundant number, since it is smaller than the sum of its proper divisors (1971963066).

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

1681295634 is a wasteful number, since it uses less digits than its factorization.

1681295634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267994 (or 267991 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 1681295634 is about 41003.6051341830. The cubic root of 1681295634 is about 1189.0899131116.

The spelling of 1681295634 in words is "one billion, six hundred eighty-one million, two hundred ninety-five thousand, six hundred thirty-four".