155920051907 has 2 divisors, whose sum is σ = 155920051908. Its totient is φ = 155920051906.

The previous prime is 155920051871. The next prime is 155920051921. The reversal of 155920051907 is 709150029551.

155920051907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (709150029551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155920051907 - 2⁶ = 155920051843 is a prime.

It is a super-2 number, since 2×155920051907² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155920051927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77960025953 + 77960025954.

It is an arithmetic number, because the mean of its divisors is an integer number (77960025954).

Almost surely, 2^155920051907 is an apocalyptic number.

155920051907 is a deficient number, since it is larger than the sum of its proper divisors (1).

155920051907 is an equidigital number, since it uses as much as digits as its factorization.

155920051907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141750, while the sum is 44.

The spelling of 155920051907 in words is "one hundred fifty-five billion, nine hundred twenty million, fifty-one thousand, nine hundred seven".