405521451402 has 16 divisors (see below), whose sum is σ = 837205577472. Its totient is φ = 130813371360.

The previous prime is 405521451359. The next prime is 405521451427. The reversal of 405521451402 is 204154125504.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1090111243 + ... + 1090111614.

It is an arithmetic number, because the mean of its divisors is an integer number (52325348592).

Almost surely, 2^405521451402 is an apocalyptic number.

405521451402 is an abundant number, since it is smaller than the sum of its proper divisors (431684126070).

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

405521451402 is a wasteful number, since it uses less digits than its factorization.

405521451402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180222893.

The product of its (nonzero) digits is 32000, while the sum is 33.

Adding to 405521451402 its reverse (204154125504), we get a palindrome (609675576906).

The spelling of 405521451402 in words is "four hundred five billion, five hundred twenty-one million, four hundred fifty-one thousand, four hundred two".