551603011512 has 128 divisors (see below), whose sum is σ = 1661503219200. Its totient is φ = 149076868608.

The previous prime is 551603011499. The next prime is 551603011567. The reversal of 551603011512 is 215110306155.

It is a super-2 number, since 2×551603011512² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 551603011512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1952058 + ... + 2216694.

It is an arithmetic number, because the mean of its divisors is an integer number (12980493900).

Almost surely, 2^551603011512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551603011512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (830751609600).

551603011512 is an abundant number, since it is smaller than the sum of its proper divisors (1109900207688).

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

551603011512 is a wasteful number, since it uses less digits than its factorization.

551603011512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265325 (or 265321 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

Adding to 551603011512 its reverse (215110306155), we get a palindrome (766713317667).

The spelling of 551603011512 in words is "five hundred fifty-one billion, six hundred three million, eleven thousand, five hundred twelve".