155705712601 has 2 divisors, whose sum is σ = 155705712602. Its totient is φ = 155705712600.

The previous prime is 155705712581. The next prime is 155705712607. The reversal of 155705712601 is 106217507551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155200542025 + 505170576 = 393955^2 + 22476^2 .

It is a cyclic number.

It is not a de Polignac number, because 155705712601 - 2⁷ = 155705712473 is a prime.

It is not a weakly prime, because it can be changed into another prime (155705712607) 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, 77852856300 + 77852856301.

It is an arithmetic number, because the mean of its divisors is an integer number (77852856301).

Almost surely, 2^155705712601 is an apocalyptic number.

It is an amenable number.

155705712601 is a deficient number, since it is larger than the sum of its proper divisors (1).

155705712601 is an equidigital number, since it uses as much as digits as its factorization.

155705712601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73500, while the sum is 40.

The spelling of 155705712601 in words is "one hundred fifty-five billion, seven hundred five million, seven hundred twelve thousand, six hundred one".