634391011063 has 8 divisors (see below), whose sum is σ = 635228867808. Its totient is φ = 633553517184.

The previous prime is 634391011057. The next prime is 634391011081. The reversal of 634391011063 is 360110193436.

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 634391011063 - 2⁹ = 634391010551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634391011043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3501595 + ... + 3678307.

It is an arithmetic number, because the mean of its divisors is an integer number (79403608476).

Almost surely, 2^634391011063 is an apocalyptic number.

634391011063 is a deficient number, since it is larger than the sum of its proper divisors (837856745).

634391011063 is a wasteful number, since it uses less digits than its factorization.

634391011063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181433.

The product of its (nonzero) digits is 34992, while the sum is 37.

The spelling of 634391011063 in words is "six hundred thirty-four billion, three hundred ninety-one million, eleven thousand, sixty-three".