551816254611 has 48 divisors (see below), whose sum is σ = 891406283040. Its totient is φ = 326894607360.

The previous prime is 551816254559. The next prime is 551816254621. The reversal of 551816254611 is 116452618155.

551816254611 is a `hidden beast` number, since 5 + 5 + 1 + 8 + 1 + 6 + 25 + 4 + 611 = 666.

551816254611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 551816254611 - 2¹⁰ = 551816253587 is a prime.

It is a super-2 number, since 2×551816254611² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (551816254621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 527821 + ... + 1175681.

It is an arithmetic number, because the mean of its divisors is an integer number (18570964230).

Almost surely, 2^551816254611 is an apocalyptic number.

551816254611 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

551816254611 is a deficient number, since it is larger than the sum of its proper divisors (339590028429).

551816254611 is a wasteful number, since it uses less digits than its factorization.

551816254611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648196 (or 648193 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The spelling of 551816254611 in words is "five hundred fifty-one billion, eight hundred sixteen million, two hundred fifty-four thousand, six hundred eleven".