155365657541 has 2 divisors, whose sum is σ = 155365657542. Its totient is φ = 155365657540.

The previous prime is 155365657463. The next prime is 155365657571. The reversal of 155365657541 is 145756563551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100736412100 + 54629245441 = 317390^2 + 233729^2 .

It is a cyclic number.

It is not a de Polignac number, because 155365657541 - 2¹⁰ = 155365656517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155365657571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77682828770 + 77682828771.

It is an arithmetic number, because the mean of its divisors is an integer number (77682828771).

Almost surely, 2^155365657541 is an apocalyptic number.

It is an amenable number.

155365657541 is a deficient number, since it is larger than the sum of its proper divisors (1).

155365657541 is an equidigital number, since it uses as much as digits as its factorization.

155365657541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9450000, while the sum is 53.

The spelling of 155365657541 in words is "one hundred fifty-five billion, three hundred sixty-five million, six hundred fifty-seven thousand, five hundred forty-one".