634834457109 has 6 divisors (see below), whose sum is σ = 916983104726. Its totient is φ = 423222971400.

The previous prime is 634834457107. The next prime is 634834457119. The reversal of 634834457109 is 901754438436.

634834457109 is a `hidden beast` number, since 6 + 3 + 4 + 83 + 4 + 457 + 109 = 666.

It can be written as a sum of positive squares in only one way, i.e., 629637489009 + 5196968100 = 793497^2 + 72090^2 .

It is not a de Polignac number, because 634834457109 - 2¹ = 634834457107 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 (634834457107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35268580942 + ... + 35268580959.

Almost surely, 2^634834457109 is an apocalyptic number.

It is an amenable number.

634834457109 is a deficient number, since it is larger than the sum of its proper divisors (282148647617).

634834457109 is a wasteful number, since it uses less digits than its factorization.

634834457109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70537161907 (or 70537161904 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 634834457109 in words is "six hundred thirty-four billion, eight hundred thirty-four million, four hundred fifty-seven thousand, one hundred nine".