634051610065 has 4 divisors (see below), whose sum is σ = 760861932084. Its totient is φ = 507241288048.

The previous prime is 634051610063. The next prime is 634051610099. The reversal of 634051610065 is 560016150436.

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 284704414929 + 349347195136 = 533577^2 + 591056^2 .

It is a cyclic number.

It is not a de Polignac number, because 634051610065 - 2¹ = 634051610063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634051610063) 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, 63405161002 + ... + 63405161011.

It is an arithmetic number, because the mean of its divisors is an integer number (190215483021).

Almost surely, 2^634051610065 is an apocalyptic number.

It is an amenable number.

634051610065 is a deficient number, since it is larger than the sum of its proper divisors (126810322019).

634051610065 is a wasteful number, since it uses less digits than its factorization.

634051610065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126810322018.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 634051610065 in words is "six hundred thirty-four billion, fifty-one million, six hundred ten thousand, sixty-five".