155007423709 has 2 divisors, whose sum is σ = 155007423710. Its totient is φ = 155007423708.

The previous prime is 155007423611. The next prime is 155007423751. The reversal of 155007423709 is 907324700551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147919467609 + 7087956100 = 384603^2 + 84190^2 .

It is a cyclic number.

It is not a de Polignac number, because 155007423709 - 2⁷ = 155007423581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155007423409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77503711854 + 77503711855.

It is an arithmetic number, because the mean of its divisors is an integer number (77503711855).

Almost surely, 2^155007423709 is an apocalyptic number.

It is an amenable number.

155007423709 is a deficient number, since it is larger than the sum of its proper divisors (1).

155007423709 is an equidigital number, since it uses as much as digits as its factorization.

155007423709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 264600, while the sum is 43.

The spelling of 155007423709 in words is "one hundred fifty-five billion, seven million, four hundred twenty-three thousand, seven hundred nine".