155632069 has 2 divisors, whose sum is σ = 155632070. Its totient is φ = 155632068.

The previous prime is 155632063. The next prime is 155632079. The reversal of 155632069 is 960236551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155301444 + 330625 = 12462^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 155632069 - 2¹¹ = 155630021 is a prime.

It is a super-2 number, since 2×155632069² = 48442681802441522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155632063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77816034 + 77816035.

It is an arithmetic number, because the mean of its divisors is an integer number (77816035).

Almost surely, 2^155632069 is an apocalyptic number.

It is an amenable number.

155632069 is a deficient number, since it is larger than the sum of its proper divisors (1).

155632069 is an equidigital number, since it uses as much as digits as its factorization.

155632069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 155632069 is about 12475.2582738795. The cubic root of 155632069 is about 537.8977120664.

The spelling of 155632069 in words is "one hundred fifty-five million, six hundred thirty-two thousand, sixty-nine".