634326432566641 has 4 divisors (see below), whose sum is σ = 634326486782272. Its totient is φ = 634326378351012.

The previous prime is 634326432566599. The next prime is 634326432566657. The reversal of 634326432566641 is 146665234623436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 634326432566641 - 2¹¹ = 634326432564593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 634326432566641.

It is not an unprimeable number, because it can be changed into a prime (634326432566681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1484085 + ... + 35649058.

It is an arithmetic number, because the mean of its divisors is an integer number (158581621695568).

Almost surely, 2^{634326432566641} is an apocalyptic number.

It is an amenable number.

634326432566641 is a deficient number, since it is larger than the sum of its proper divisors (54215631).

634326432566641 is a wasteful number, since it uses less digits than its factorization.

634326432566641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54215630.

The product of its digits is 268738560, while the sum is 61.

The spelling of 634326432566641 in words is "six hundred thirty-four trillion, three hundred twenty-six billion, four hundred thirty-two million, five hundred sixty-six thousand, six hundred forty-one".