634220211540 has 96 divisors (see below), whose sum is σ = 1778731194240. Its totient is φ = 168848064000.

The previous prime is 634220211511. The next prime is 634220211551. The reversal of 634220211540 is 45112022436.

634220211540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 634220211498 and 634220211507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130468710 + ... + 130473570.

It is an arithmetic number, because the mean of its divisors is an integer number (18528449940).

Almost surely, 2^634220211540 is an apocalyptic number.

634220211540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

634220211540 is an abundant number, since it is smaller than the sum of its proper divisors (1144510982700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634220211540 is a wasteful number, since it uses less digits than its factorization.

634220211540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7993 (or 7991 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 634220211540 its reverse (45112022436), we get a palindrome (679332233976).

The spelling of 634220211540 in words is "six hundred thirty-four billion, two hundred twenty million, two hundred eleven thousand, five hundred forty".