635421412040 has 64 divisors (see below), whose sum is σ = 1515638770560. Its totient is φ = 238926597120.

The previous prime is 635421412001. The next prime is 635421412097. The reversal of 635421412040 is 40214124536.

It is a junction number, because it is equal to n+sod(n) for n = 635421411988 and 635421412006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8066 + ... + 1127345.

It is an arithmetic number, because the mean of its divisors is an integer number (23681855790).

Almost surely, 2^635421412040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 635421412040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (757819385280).

635421412040 is an abundant number, since it is smaller than the sum of its proper divisors (880217358520).

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

635421412040 is a wasteful number, since it uses less digits than its factorization.

635421412040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136262 (or 1136258 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 635421412040 its reverse (40214124536), we get a palindrome (675635536576).

The spelling of 635421412040 in words is "six hundred thirty-five billion, four hundred twenty-one million, four hundred twelve thousand, forty".