155712120052007 has 2 divisors, whose sum is σ = 155712120052008. Its totient is φ = 155712120052006.

The previous prime is 155712120051989. The next prime is 155712120052043. The reversal of 155712120052007 is 700250021217551.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155712120052007 - 2²⁰ = 155712119003431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155712120052057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77856060026003 + 77856060026004.

It is an arithmetic number, because the mean of its divisors is an integer number (77856060026004).

Almost surely, 2^{155712120052007} is an apocalyptic number.

155712120052007 is a deficient number, since it is larger than the sum of its proper divisors (1).

155712120052007 is an equidigital number, since it uses as much as digits as its factorization.

155712120052007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49000, while the sum is 38.

Adding to 155712120052007 its reverse (700250021217551), we get a palindrome (855962141269558).

The spelling of 155712120052007 in words is "one hundred fifty-five trillion, seven hundred twelve billion, one hundred twenty million, fifty-two thousand, seven".