551056165650 has 36 divisors (see below), whose sum is σ = 1480504232922. Its totient is φ = 146948310720.

The previous prime is 551056165637. The next prime is 551056165669. The reversal of 551056165650 is 56561650155.

It can be written as a sum of positive squares in 3 ways, for example, as 302881820409 + 248174345241 = 550347^2 + 498171^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 551056165596 and 551056165605.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 612284179 + ... + 612285078.

Almost surely, 2^551056165650 is an apocalyptic number.

551056165650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

551056165650 is an abundant number, since it is smaller than the sum of its proper divisors (929448067272).

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

551056165650 is a wasteful number, since it uses less digits than its factorization.

551056165650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224569275 (or 1224569267 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 45.

The spelling of 551056165650 in words is "five hundred fifty-one billion, fifty-six million, one hundred sixty-five thousand, six hundred fifty".