155401700117 has 2 divisors, whose sum is σ = 155401700118. Its totient is φ = 155401700116.

The previous prime is 155401700101. The next prime is 155401700119. The reversal of 155401700117 is 711007104551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88129421956 + 67272278161 = 296866^2 + 259369^2 .

It is a cyclic number.

It is not a de Polignac number, because 155401700117 - 2⁴ = 155401700101 is a prime.

Together with 155401700119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155401700119) 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, 77700850058 + 77700850059.

It is an arithmetic number, because the mean of its divisors is an integer number (77700850059).

Almost surely, 2^155401700117 is an apocalyptic number.

It is an amenable number.

155401700117 is a deficient number, since it is larger than the sum of its proper divisors (1).

155401700117 is an equidigital number, since it uses as much as digits as its factorization.

155401700117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4900, while the sum is 32.

Adding to 155401700117 its reverse (711007104551), we get a palindrome (866408804668).

The spelling of 155401700117 in words is "one hundred fifty-five billion, four hundred one million, seven hundred thousand, one hundred seventeen".