1634042671 has 4 divisors (see below), whose sum is σ = 1690389000. Its totient is φ = 1577696344.

The previous prime is 1634042647. The next prime is 1634042681. The reversal of 1634042671 is 1762404361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1762404361 = 41981².

It is a cyclic number.

It is not a de Polignac number, because 1634042671 - 2⁵ = 1634042639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1634042681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28173121 + ... + 28173178.

It is an arithmetic number, because the mean of its divisors is an integer number (422597250).

Almost surely, 2^1634042671 is an apocalyptic number.

1634042671 is a deficient number, since it is larger than the sum of its proper divisors (56346329).

1634042671 is an equidigital number, since it uses as much as digits as its factorization.

1634042671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56346328.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 1634042671 is about 40423.2936683789. The cubic root of 1634042671 is about 1177.8440646602.

The spelling of 1634042671 in words is "one billion, six hundred thirty-four million, forty-two thousand, six hundred seventy-one".