1554355531541 has 2 divisors, whose sum is σ = 1554355531542. Its totient is φ = 1554355531540.

The previous prime is 1554355531529. The next prime is 1554355531579. The reversal of 1554355531541 is 1451355534551.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1217317229041 + 337038302500 = 1103321^2 + 580550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1554355531541 - 2¹⁴ = 1554355515157 is a prime.

It is a super-2 number, since 2×1554355531541² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1554355531501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777177765770 + 777177765771.

It is an arithmetic number, because the mean of its divisors is an integer number (777177765771).

Almost surely, 2^{1554355531541} is an apocalyptic number.

It is an amenable number.

1554355531541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1554355531541 is an equidigital number, since it uses as much as digits as its factorization.

1554355531541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2250000, while the sum is 47.

The spelling of 1554355531541 in words is "one trillion, five hundred fifty-four billion, three hundred fifty-five million, five hundred thirty-one thousand, five hundred forty-one".