123957138193 has 16 divisors (see below), whose sum is σ = 150969876480. Its totient is φ = 99467120016.

The previous prime is 123957138169. The next prime is 123957138211. The reversal of 123957138193 is 391831759321.

It is not a de Polignac number, because 123957138193 - 2¹³ = 123957130001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123957138193.

It is not an unprimeable number, because it can be changed into a prime (123957138143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8183073 + ... + 8198206.

It is an arithmetic number, because the mean of its divisors is an integer number (9435617280).

Almost surely, 2^123957138193 is an apocalyptic number.

It is an amenable number.

123957138193 is a deficient number, since it is larger than the sum of its proper divisors (27012738287).

123957138193 is a wasteful number, since it uses less digits than its factorization.

123957138193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16381356.

The product of its digits is 1224720, while the sum is 52.

The spelling of 123957138193 in words is "one hundred twenty-three billion, nine hundred fifty-seven million, one hundred thirty-eight thousand, one hundred ninety-three".