551401050505 has 4 divisors (see below), whose sum is σ = 661681260612. Its totient is φ = 441120840400.

The previous prime is 551401050467. The next prime is 551401050511. The reversal of 551401050505 is 505050104155.

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 113404603536 + 437996446969 = 336756^2 + 661813^2 .

It is not a de Polignac number, because 551401050505 - 2¹⁵ = 551401017737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55140105046 + ... + 55140105055.

It is an arithmetic number, because the mean of its divisors is an integer number (165420315153).

Almost surely, 2^551401050505 is an apocalyptic number.

It is an amenable number.

551401050505 is a deficient number, since it is larger than the sum of its proper divisors (110280210107).

551401050505 is a wasteful number, since it uses less digits than its factorization.

551401050505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110280210106.

The product of its (nonzero) digits is 12500, while the sum is 31.

The spelling of 551401050505 in words is "five hundred fifty-one billion, four hundred one million, fifty thousand, five hundred five".