155401630777 has 2 divisors, whose sum is σ = 155401630778. Its totient is φ = 155401630776.

The previous prime is 155401630763. The next prime is 155401630847. The reversal of 155401630777 is 777036104551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82555080976 + 72846549801 = 287324^2 + 269901^2 .

It is a cyclic number.

It is not a de Polignac number, because 155401630777 - 2³¹ = 153254147129 is a prime.

It is not a weakly prime, because it can be changed into another prime (155401630717) 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, 77700815388 + 77700815389.

It is an arithmetic number, because the mean of its divisors is an integer number (77700815389).

Almost surely, 2^155401630777 is an apocalyptic number.

It is an amenable number.

155401630777 is a deficient number, since it is larger than the sum of its proper divisors (1).

155401630777 is an equidigital number, since it uses as much as digits as its factorization.

155401630777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 617400, while the sum is 46.

The spelling of 155401630777 in words is "one hundred fifty-five billion, four hundred one million, six hundred thirty thousand, seven hundred seventy-seven".