155985829273 has 2 divisors, whose sum is σ = 155985829274. Its totient is φ = 155985829272.

The previous prime is 155985829229. The next prime is 155985829283. The reversal of 155985829273 is 372928589551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137750837904 + 18234991369 = 371148^2 + 135037^2 .

It is a cyclic number.

It is not a de Polignac number, because 155985829273 - 2¹³ = 155985821081 is a prime.

It is not a weakly prime, because it can be changed into another prime (155985829283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77992914636 + 77992914637.

It is an arithmetic number, because the mean of its divisors is an integer number (77992914637).

Almost surely, 2^155985829273 is an apocalyptic number.

It is an amenable number.

155985829273 is a deficient number, since it is larger than the sum of its proper divisors (1).

155985829273 is an equidigital number, since it uses as much as digits as its factorization.

155985829273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432000, while the sum is 64.

The spelling of 155985829273 in words is "one hundred fifty-five billion, nine hundred eighty-five million, eight hundred twenty-nine thousand, two hundred seventy-three".