155507641 has 2 divisors, whose sum is σ = 155507642. Its totient is φ = 155507640.

The previous prime is 155507557. The next prime is 155507689. The reversal of 155507641 is 146705551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139145616 + 16362025 = 11796^2 + 4045^2 .

It is a cyclic number.

It is not a de Polignac number, because 155507641 - 2²⁷ = 21289913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155507597 and 155507606.

It is not a weakly prime, because it can be changed into another prime (155501641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77753820 + 77753821.

It is an arithmetic number, because the mean of its divisors is an integer number (77753821).

Almost surely, 2^155507641 is an apocalyptic number.

It is an amenable number.

155507641 is a deficient number, since it is larger than the sum of its proper divisors (1).

155507641 is an equidigital number, since it uses as much as digits as its factorization.

155507641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 155507641 is about 12470.2702857637. The cubic root of 155507641 is about 537.7543239211.

The spelling of 155507641 in words is "one hundred fifty-five million, five hundred seven thousand, six hundred forty-one".