156381660123 has 12 divisors (see below), whose sum is σ = 225781805880. Its totient is φ = 96234867456.

The previous prime is 156381660119. The next prime is 156381660151. The reversal of 156381660123 is 321066183651.

It is not a de Polignac number, because 156381660123 - 2² = 156381660119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (156381610123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154222038 + ... + 154223051.

It is an arithmetic number, because the mean of its divisors is an integer number (18815150490).

Almost surely, 2^156381660123 is an apocalyptic number.

156381660123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

156381660123 is a deficient number, since it is larger than the sum of its proper divisors (69400145757).

156381660123 is a wasteful number, since it uses less digits than its factorization.

156381660123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308445118 (or 308445105 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

It can be divided in two parts, 15638 and 1660123, that added together give a palindrome (1675761).

The spelling of 156381660123 in words is "one hundred fifty-six billion, three hundred eighty-one million, six hundred sixty thousand, one hundred twenty-three".