155955525759617 has 2 divisors, whose sum is σ = 155955525759618. Its totient is φ = 155955525759616.

The previous prime is 155955525759587. The next prime is 155955525759623. The reversal of 155955525759617 is 716957525559551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80190878764096 + 75764646995521 = 8954936^2 + 8704289^2 .

It is a cyclic number.

It is not a de Polignac number, because 155955525759617 - 2¹⁴ = 155955525743233 is a prime.

It is not a weakly prime, because it can be changed into another prime (155955525759647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77977762879808 + 77977762879809.

It is an arithmetic number, because the mean of its divisors is an integer number (77977762879809).

Almost surely, 2^{155955525759617} is an apocalyptic number.

It is an amenable number.

155955525759617 is a deficient number, since it is larger than the sum of its proper divisors (1).

155955525759617 is an equidigital number, since it uses as much as digits as its factorization.

155955525759617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3720937500, while the sum is 77.

The spelling of 155955525759617 in words is "one hundred fifty-five trillion, nine hundred fifty-five billion, five hundred twenty-five million, seven hundred fifty-nine thousand, six hundred seventeen".