157797234169 has 3 divisors (see below), whose sum is σ = 157797631407. Its totient is φ = 157796836932.

The previous prime is 157797234157. The next prime is 157797234223. The reversal of 157797234169 is 961432797751.

The square root of 157797234169 is 397237.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 44085301225 + 113711932944 = 209965^2 + 337212^2 .

It is not a de Polignac number, because 157797234169 - 2¹¹ = 157797232121 is a prime.

It is a super-2 number, since 2×157797234169² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157797234269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 198619 + ... + 595855.

It is an arithmetic number, because the mean of its divisors is an integer number (52599210469).

Almost surely, 2^157797234169 is an apocalyptic number.

157797234169 is the 397237-th square number.

157797234169 is the 198619-th centered octagonal number.

It is an amenable number.

157797234169 is a deficient number, since it is larger than the sum of its proper divisors (397238).

157797234169 is an frugal number, since it uses more digits than its factorization.

157797234169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794474 (or 397237 counting only the distinct ones).

The product of its digits is 20003760, while the sum is 61.

The spelling of 157797234169 in words is "one hundred fifty-seven billion, seven hundred ninety-seven million, two hundred thirty-four thousand, one hundred sixty-nine".