551511561150 has 144 divisors (see below), whose sum is σ = 1616781675600. Its totient is φ = 133670707200.

The previous prime is 551511561143. The next prime is 551511561169. The reversal of 551511561150 is 51165115155.

551511561150 is a `hidden beast` number, since 551 + 5 + 1 + 1 + 56 + 1 + 1 + 50 = 666.

It is a super-2 number, since 2×551511561150² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 30547326 + ... + 30565374.

It is an arithmetic number, because the mean of its divisors is an integer number (11227650525).

Almost surely, 2^551511561150 is an apocalyptic number.

551511561150 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 551511561150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (808390837800).

551511561150 is an abundant number, since it is smaller than the sum of its proper divisors (1065270114450).

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

551511561150 is a wasteful number, since it uses less digits than its factorization.

551511561150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24251 (or 24243 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 36.

The spelling of 551511561150 in words is "five hundred fifty-one billion, five hundred eleven million, five hundred sixty-one thousand, one hundred fifty".