402556424655205 has 4 divisors (see below), whose sum is σ = 483067709586252. Its totient is φ = 322045139724160.

The previous prime is 402556424655191. The next prime is 402556424655233. The reversal of 402556424655205 is 502556424655204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 158915824617124 + 243640600038081 = 12606182^2 + 15608991^2 .

It is not a de Polignac number, because 402556424655205 - 2⁵ = 402556424655173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40255642465516 + ... + 40255642465525.

It is an arithmetic number, because the mean of its divisors is an integer number (120766927396563).

Almost surely, 2^{402556424655205} is an apocalyptic number.

It is an amenable number.

402556424655205 is a deficient number, since it is larger than the sum of its proper divisors (80511284931047).

402556424655205 is an equidigital number, since it uses as much as digits as its factorization.

402556424655205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80511284931046.

The product of its (nonzero) digits is 57600000, while the sum is 55.

Subtracting 402556424655205 from its reverse (502556424655204), we obtain a palindrome (99999999999999).

The spelling of 402556424655205 in words is "four hundred two trillion, five hundred fifty-six billion, four hundred twenty-four million, six hundred fifty-five thousand, two hundred five".