155061601117 has 2 divisors, whose sum is σ = 155061601118. Its totient is φ = 155061601116.

The previous prime is 155061601073. The next prime is 155061601133. The reversal of 155061601117 is 711106160551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107360420281 + 47701180836 = 327659^2 + 218406^2 .

It is a cyclic number.

It is not a de Polignac number, because 155061601117 - 2³¹ = 152914117469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155061601187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77530800558 + 77530800559.

It is an arithmetic number, because the mean of its divisors is an integer number (77530800559).

Almost surely, 2^155061601117 is an apocalyptic number.

It is an amenable number.

155061601117 is a deficient number, since it is larger than the sum of its proper divisors (1).

155061601117 is an equidigital number, since it uses as much as digits as its factorization.

155061601117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 34.

Adding to 155061601117 its reverse (711106160551), we get a palindrome (866167761668).

The spelling of 155061601117 in words is "one hundred fifty-five billion, sixty-one million, six hundred one thousand, one hundred seventeen".