634466989565 has 8 divisors (see below), whose sum is σ = 761389211448. Its totient is φ = 507554375680.

The previous prime is 634466989517. The next prime is 634466989603. The reversal of 634466989565 is 565989664436.

It can be written as a sum of positive squares in 4 ways, for example, as 49587718489 + 584879271076 = 222683^2 + 764774^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 634466989565 - 2¹⁰ = 634466988541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2255912 + ... + 2521521.

It is an arithmetic number, because the mean of its divisors is an integer number (95173651431).

Almost surely, 2^634466989565 is an apocalyptic number.

It is an amenable number.

634466989565 is a deficient number, since it is larger than the sum of its proper divisors (126922221883).

634466989565 is a wasteful number, since it uses less digits than its factorization.

634466989565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4803999.

The product of its digits is 1007769600, while the sum is 71.

The spelling of 634466989565 in words is "six hundred thirty-four billion, four hundred sixty-six million, nine hundred eighty-nine thousand, five hundred sixty-five".