123137236157 has 8 divisors (see below), whose sum is σ = 132612469080. Its totient is φ = 113662451520.

The previous prime is 123137236153. The next prime is 123137236253. The reversal of 123137236157 is 751632731321.

It can be written as a sum of positive squares in 4 ways, for example, as 3383865241 + 119753370916 = 58171^2 + 346054^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123137236157 - 2² = 123137236153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123137236151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650807 + ... + 818427.

It is an arithmetic number, because the mean of its divisors is an integer number (16576558635).

Almost surely, 2^123137236157 is an apocalyptic number.

It is an amenable number.

123137236157 is a deficient number, since it is larger than the sum of its proper divisors (9475232923).

123137236157 is a wasteful number, since it uses less digits than its factorization.

123137236157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224143.

The product of its digits is 158760, while the sum is 41.

Adding to 123137236157 its reverse (751632731321), we get a palindrome (874769967478).

The spelling of 123137236157 in words is "one hundred twenty-three billion, one hundred thirty-seven million, two hundred thirty-six thousand, one hundred fifty-seven".