156921763447680 has 1152 divisors, whose sum is σ = 660188083322880. Its totient is φ = 31555206144000.

The previous prime is 156921763447667. The next prime is 156921763447697. The reversal of 156921763447680 is 86744367129651.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 352671745 + ... + 353116415.

It is an arithmetic number, because the mean of its divisors is an integer number (573079933440).

It is a 1-persistent number, because it is pandigital, but 2⋅156921763447680 = 313843526895360 is not.

Almost surely, 2^{156921763447680} is an apocalyptic number.

156921763447680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156921763447680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330094041661440).

156921763447680 is an abundant number, since it is smaller than the sum of its proper divisors (503266319875200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156921763447680 is a wasteful number, since it uses less digits than its factorization.

156921763447680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444760 (or 444730 counting only the distinct ones).

The product of its (nonzero) digits is 365783040, while the sum is 69.

The spelling of 156921763447680 in words is "one hundred fifty-six trillion, nine hundred twenty-one billion, seven hundred sixty-three million, four hundred forty-seven thousand, six hundred eighty".