551244445877 has 2 divisors, whose sum is σ = 551244445878. Its totient is φ = 551244445876.

The previous prime is 551244445847. The next prime is 551244445933. The reversal of 551244445877 is 778544442155.

It is an a-pointer prime, because the next prime (551244445933) can be obtained adding 551244445877 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 493420548721 + 57823897156 = 702439^2 + 240466^2 .

It is a cyclic number.

It is not a de Polignac number, because 551244445877 - 2¹⁴ = 551244429493 is a prime.

It is a super-2 number, since 2×551244445877² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551244445847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275622222938 + 275622222939.

It is an arithmetic number, because the mean of its divisors is an integer number (275622222939).

Almost surely, 2^551244445877 is an apocalyptic number.

It is an amenable number.

551244445877 is a deficient number, since it is larger than the sum of its proper divisors (1).

551244445877 is an equidigital number, since it uses as much as digits as its factorization.

551244445877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088000, while the sum is 56.

The spelling of 551244445877 in words is "five hundred fifty-one billion, two hundred forty-four million, four hundred forty-five thousand, eight hundred seventy-seven".