634868030761 has 4 divisors (see below), whose sum is σ = 638375589124. Its totient is φ = 631360472400.

The previous prime is 634868030737. The next prime is 634868030779. The reversal of 634868030761 is 167030868436.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 221233826025 + 413634204736 = 470355^2 + 643144^2 .

It is a cyclic number.

It is not a de Polignac number, because 634868030761 - 2²⁵ = 634834476329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 634868030699 and 634868030708.

It is not an unprimeable number, because it can be changed into a prime (634868030161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1753778910 + ... + 1753779271.

It is an arithmetic number, because the mean of its divisors is an integer number (159593897281).

Almost surely, 2^634868030761 is an apocalyptic number.

It is an amenable number.

634868030761 is a deficient number, since it is larger than the sum of its proper divisors (3507558363).

634868030761 is a wasteful number, since it uses less digits than its factorization.

634868030761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3507558362.

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 634868030761 in words is "six hundred thirty-four billion, eight hundred sixty-eight million, thirty thousand, seven hundred sixty-one".