157122020789 has 2 divisors, whose sum is σ = 157122020790. Its totient is φ = 157122020788.

The previous prime is 157122020749. The next prime is 157122020801. The reversal of 157122020789 is 987020221751.

157122020789 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 can be written as a sum of positive squares in only one way, i.e., 95764253764 + 61357767025 = 309458^2 + 247705^2 .

It is a cyclic number.

It is not a de Polignac number, because 157122020789 - 2⁸ = 157122020533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157122020749) 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, 78561010394 + 78561010395.

It is an arithmetic number, because the mean of its divisors is an integer number (78561010395).

Almost surely, 2^157122020789 is an apocalyptic number.

It is an amenable number.

157122020789 is a deficient number, since it is larger than the sum of its proper divisors (1).

157122020789 is an equidigital number, since it uses as much as digits as its factorization.

157122020789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 157122020789 in words is "one hundred fifty-seven billion, one hundred twenty-two million, twenty thousand, seven hundred eighty-nine".