402012065505 has 16 divisors (see below), whose sum is σ = 645610461120. Its totient is φ = 213609382848.

The previous prime is 402012065501. The next prime is 402012065527. The reversal of 402012065505 is 505560210204.

It is not a de Polignac number, because 402012065505 - 2² = 402012065501 is a prime.

It is a super-2 number, since 2×402012065505² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402012065501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49811587 + ... + 49819656.

It is an arithmetic number, because the mean of its divisors is an integer number (40350653820).

Almost surely, 2^402012065505 is an apocalyptic number.

It is an amenable number.

402012065505 is a deficient number, since it is larger than the sum of its proper divisors (243598395615).

402012065505 is a wasteful number, since it uses less digits than its factorization.

402012065505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99631520.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 402012065505 its reverse (505560210204), we get a palindrome (907572275709).

The spelling of 402012065505 in words is "four hundred two billion, twelve million, sixty-five thousand, five hundred five".