551501815873 has 2 divisors, whose sum is σ = 551501815874. Its totient is φ = 551501815872.

The previous prime is 551501815847. The next prime is 551501815877. The reversal of 551501815873 is 378518105155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544713374209 + 6788441664 = 738047^2 + 82392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551501815873 is a prime.

It is a super-2 number, since 2×551501815873² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (551501815877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275750907936 + 275750907937.

It is an arithmetic number, because the mean of its divisors is an integer number (275750907937).

Almost surely, 2^551501815873 is an apocalyptic number.

It is an amenable number.

551501815873 is a deficient number, since it is larger than the sum of its proper divisors (1).

551501815873 is an equidigital number, since it uses as much as digits as its factorization.

551501815873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840000, while the sum is 49.

The spelling of 551501815873 in words is "five hundred fifty-one billion, five hundred one million, eight hundred fifteen thousand, eight hundred seventy-three".