634432045466521 has 8 divisors (see below), whose sum is σ = 643901606520480. Its totient is φ = 624962496943488.

The previous prime is 634432045466519. The next prime is 634432045466567. The reversal of 634432045466521 is 125664540234436.

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

It is a cyclic number.

It is not a de Polignac number, because 634432045466521 - 2¹ = 634432045466519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634432045466221) 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 7 ways as a sum of consecutive naturals, for example, 168696585 + ... + 172416361.

It is an arithmetic number, because the mean of its divisors is an integer number (80487700815060).

Almost surely, 2^{634432045466521} is an apocalyptic number.

It is an amenable number.

634432045466521 is a deficient number, since it is larger than the sum of its proper divisors (9469561053959).

634432045466521 is a wasteful number, since it uses less digits than its factorization.

634432045466521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6265463.

The product of its (nonzero) digits is 49766400, while the sum is 55.

The spelling of 634432045466521 in words is "six hundred thirty-four trillion, four hundred thirty-two billion, forty-five million, four hundred sixty-six thousand, five hundred twenty-one".