402135150444 has 24 divisors (see below), whose sum is σ = 938805898800. Its totient is φ = 133974971904.

The previous prime is 402135150421. The next prime is 402135150451. The reversal of 402135150444 is 444051531204.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8735869 + ... + 8781780.

It is an arithmetic number, because the mean of its divisors is an integer number (39116912450).

Almost surely, 2^402135150444 is an apocalyptic number.

It is an amenable number.

402135150444 is an abundant number, since it is smaller than the sum of its proper divisors (536670748356).

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

402135150444 is a wasteful number, since it uses less digits than its factorization.

402135150444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17519569 (or 17519567 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 402135150444 its reverse (444051531204), we get a palindrome (846186681648).

The spelling of 402135150444 in words is "four hundred two billion, one hundred thirty-five million, one hundred fifty thousand, four hundred forty-four".