551161605100 has 72 divisors (see below), whose sum is σ = 1201421697840. Its totient is φ = 219470388480.

The previous prime is 551161605077. The next prime is 551161605103. The reversal of 551161605100 is 1506161155.

It is a super-2 number, since 2×551161605100² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (551161605103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36926239 + ... + 36941161.

It is an arithmetic number, because the mean of its divisors is an integer number (16686412470).

Almost surely, 2^551161605100 is an apocalyptic number.

551161605100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

551161605100 is an abundant number, since it is smaller than the sum of its proper divisors (650260092740).

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

551161605100 is a wasteful number, since it uses less digits than its factorization.

551161605100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16579 (or 16572 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 551161605100 its reverse (1506161155), we get a palindrome (552667766255).

The spelling of 551161605100 in words is "five hundred fifty-one billion, one hundred sixty-one million, six hundred five thousand, one hundred".