155480617 has 2 divisors, whose sum is σ = 155480618. Its totient is φ = 155480616.

The previous prime is 155480599. The next prime is 155480659. The reversal of 155480617 is 716084551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153660816 + 1819801 = 12396^2 + 1349^2 .

It is a cyclic number.

It is not a de Polignac number, because 155480617 - 2²³ = 147092009 is a prime.

It is not a weakly prime, because it can be changed into another prime (155480417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77740308 + 77740309.

It is an arithmetic number, because the mean of its divisors is an integer number (77740309).

Almost surely, 2^155480617 is an apocalyptic number.

It is an amenable number.

155480617 is a deficient number, since it is larger than the sum of its proper divisors (1).

155480617 is an equidigital number, since it uses as much as digits as its factorization.

155480617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 155480617 is about 12469.1867016257. The cubic root of 155480617 is about 537.7231719369.

The spelling of 155480617 in words is "one hundred fifty-five million, four hundred eighty thousand, six hundred seventeen".