1554355531349 has 2 divisors, whose sum is σ = 1554355531350. Its totient is φ = 1554355531348.

The previous prime is 1554355531343. The next prime is 1554355531411. The reversal of 1554355531349 is 9431355534551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1170442696900 + 383912834449 = 1081870^2 + 619607^2 .

It is a cyclic number.

It is not a de Polignac number, because 1554355531349 - 2³⁶ = 1485636054613 is a prime.

It is a super-2 number, since 2×1554355531349² (a number of 25 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 1554355531349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1554355531343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777177765674 + 777177765675.

It is an arithmetic number, because the mean of its divisors is an integer number (777177765675).

Almost surely, 2^{1554355531349} is an apocalyptic number.

It is an amenable number.

1554355531349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1554355531349 is an equidigital number, since it uses as much as digits as its factorization.

1554355531349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12150000, while the sum is 53.

The spelling of 1554355531349 in words is "one trillion, five hundred fifty-four billion, three hundred fifty-five million, five hundred thirty-one thousand, three hundred forty-nine".