155800713557 has 2 divisors, whose sum is σ = 155800713558. Its totient is φ = 155800713556.

The previous prime is 155800713547. The next prime is 155800713613. The reversal of 155800713557 is 755317008551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122360739601 + 33439973956 = 349801^2 + 182866^2 .

It is a cyclic number.

It is not a de Polignac number, because 155800713557 - 2¹⁰ = 155800712533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155800713517) 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, 77900356778 + 77900356779.

It is an arithmetic number, because the mean of its divisors is an integer number (77900356779).

Almost surely, 2^155800713557 is an apocalyptic number.

It is an amenable number.

155800713557 is a deficient number, since it is larger than the sum of its proper divisors (1).

155800713557 is an equidigital number, since it uses as much as digits as its factorization.

155800713557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 735000, while the sum is 47.

The spelling of 155800713557 in words is "one hundred fifty-five billion, eight hundred million, seven hundred thirteen thousand, five hundred fifty-seven".