634611133626601 has 4 divisors (see below), whose sum is σ = 636024521452500. Its totient is φ = 633197745800704.

The previous prime is 634611133626577. The next prime is 634611133626607. The reversal of 634611133626601 is 106626331116436.

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 372176479599376 + 262434654027225 = 19291876^2 + 16199835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634611133626601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634611133626607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706693912276 + ... + 706693913173.

It is an arithmetic number, because the mean of its divisors is an integer number (159006130363125).

Almost surely, 2^{634611133626601} is an apocalyptic number.

It is an amenable number.

634611133626601 is a deficient number, since it is larger than the sum of its proper divisors (1413387825899).

634611133626601 is a wasteful number, since it uses less digits than its factorization.

634611133626601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413387825898.

The product of its (nonzero) digits is 1679616, while the sum is 49.

The spelling of 634611133626601 in words is "six hundred thirty-four trillion, six hundred eleven billion, one hundred thirty-three million, six hundred twenty-six thousand, six hundred one".