402421320104 has 8 divisors (see below), whose sum is σ = 754539975210. Its totient is φ = 201210660048.

The previous prime is 402421320097. The next prime is 402421320127. The reversal of 402421320104 is 401023124204.

It can be written as a sum of positive squares in only one way, i.e., 312930597604 + 89490722500 = 559402^2 + 299150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 402421320104.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25151332499 + ... + 25151332514.

Almost surely, 2^402421320104 is an apocalyptic number.

It is an amenable number.

402421320104 is a deficient number, since it is larger than the sum of its proper divisors (352118655106).

402421320104 is a wasteful number, since it uses less digits than its factorization.

402421320104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50302665019 (or 50302665015 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 402421320104 its reverse (401023124204), we get a palindrome (803444444308).

The spelling of 402421320104 in words is "four hundred two billion, four hundred twenty-one million, three hundred twenty thousand, one hundred four".