123881157178 has 8 divisors (see below), whose sum is σ = 185891157972. Its totient is φ = 61917437856.

The previous prime is 123881157173. The next prime is 123881157203. The reversal of 123881157178 is 871751188321.

It can be written as a sum of positive squares in 2 ways, for example, as 100148830369 + 23732326809 = 316463^2 + 154053^2 .

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

It is a super-2 number, since 2×123881157178² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123881157173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11563675 + ... + 11574382.

Almost surely, 2^123881157178 is an apocalyptic number.

123881157178 is a deficient number, since it is larger than the sum of its proper divisors (62010000794).

123881157178 is a wasteful number, since it uses less digits than its factorization.

123881157178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23140736.

The product of its digits is 752640, while the sum is 52.

The spelling of 123881157178 in words is "one hundred twenty-three billion, eight hundred eighty-one million, one hundred fifty-seven thousand, one hundred seventy-eight".