634920538101 has 16 divisors (see below), whose sum is σ = 887225228160. Its totient is φ = 403108833600.

The previous prime is 634920538097. The next prime is 634920538183. The reversal of 634920538101 is 101835029436.

It is not a de Polignac number, because 634920538101 - 2² = 634920538097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634920538501) 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 15 ways as a sum of consecutive naturals, for example, 20075350 + ... + 20106951.

It is an arithmetic number, because the mean of its divisors is an integer number (55451576760).

Almost surely, 2^634920538101 is an apocalyptic number.

It is an amenable number.

634920538101 is a deficient number, since it is larger than the sum of its proper divisors (252304690059).

634920538101 is a wasteful number, since it uses less digits than its factorization.

634920538101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40182556.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 634920538101 in words is "six hundred thirty-four billion, nine hundred twenty million, five hundred thirty-eight thousand, one hundred one".