155405052307 has 2 divisors, whose sum is σ = 155405052308. Its totient is φ = 155405052306.

The previous prime is 155405052221. The next prime is 155405052329. The reversal of 155405052307 is 703250504551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155405052307 is a prime.

It is not a weakly prime, because it can be changed into another prime (155405022307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77702526153 + 77702526154.

It is an arithmetic number, because the mean of its divisors is an integer number (77702526154).

Almost surely, 2^155405052307 is an apocalyptic number.

155405052307 is a deficient number, since it is larger than the sum of its proper divisors (1).

155405052307 is an equidigital number, since it uses as much as digits as its factorization.

155405052307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105000, while the sum is 37.

Adding to 155405052307 its reverse (703250504551), we get a palindrome (858655556858).

The spelling of 155405052307 in words is "one hundred fifty-five billion, four hundred five million, fifty-two thousand, three hundred seven".