155887788601 has 2 divisors, whose sum is σ = 155887788602. Its totient is φ = 155887788600.

The previous prime is 155887788547. The next prime is 155887788619. The reversal of 155887788601 is 106887788551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124273170576 + 31614618025 = 352524^2 + 177805^2 .

It is an emirp because it is prime and its reverse (106887788551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155887788601 - 2¹⁵ = 155887755833 is a prime.

It is not a weakly prime, because it can be changed into another prime (155887786601) 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, 77943894300 + 77943894301.

It is an arithmetic number, because the mean of its divisors is an integer number (77943894301).

Almost surely, 2^155887788601 is an apocalyptic number.

It is an amenable number.

155887788601 is a deficient number, since it is larger than the sum of its proper divisors (1).

155887788601 is an equidigital number, since it uses as much as digits as its factorization.

155887788601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30105600, while the sum is 64.

The spelling of 155887788601 in words is "one hundred fifty-five billion, eight hundred eighty-seven million, seven hundred eighty-eight thousand, six hundred one".