551523660533749 has 2 divisors, whose sum is σ = 551523660533750. Its totient is φ = 551523660533748.

The previous prime is 551523660533701. The next prime is 551523660533761. The reversal of 551523660533749 is 947335066325155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 465279136308900 + 86244524224849 = 21570330^2 + 9286793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551523660533749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551523660537749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275761830266874 + 275761830266875.

It is an arithmetic number, because the mean of its divisors is an integer number (275761830266875).

Almost surely, 2^{551523660533749} is an apocalyptic number.

It is an amenable number.

551523660533749 is a deficient number, since it is larger than the sum of its proper divisors (1).

551523660533749 is an equidigital number, since it uses as much as digits as its factorization.

551523660533749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180000, while the sum is 64.

The spelling of 551523660533749 in words is "five hundred fifty-one trillion, five hundred twenty-three billion, six hundred sixty million, five hundred thirty-three thousand, seven hundred forty-nine".