156621728013 has 8 divisors (see below), whose sum is σ = 210230508000. Its totient is φ = 103713716688.

The previous prime is 156621727973. The next prime is 156621728041. The reversal of 156621728013 is 310827126651.

It is a happy number.

156621728013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 156621728013 - 2⁹ = 156621727501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156621728063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175191643 + ... + 175192536.

It is an arithmetic number, because the mean of its divisors is an integer number (26278813500).

Almost surely, 2^156621728013 is an apocalyptic number.

It is an amenable number.

156621728013 is a deficient number, since it is larger than the sum of its proper divisors (53608779987).

156621728013 is a wasteful number, since it uses less digits than its factorization.

156621728013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350384331.

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 156621728013 in words is "one hundred fifty-six billion, six hundred twenty-one million, seven hundred twenty-eight thousand, thirteen".