156985438752 has 144 divisors (see below), whose sum is σ = 458957378880. Its totient is φ = 50862629376.

The previous prime is 156985438703. The next prime is 156985438777. The reversal of 156985438752 is 257834589651.

156985438752 is a `hidden beast` number, since 1 + 5 + 6 + 9 + 8 + 543 + 87 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 156985438752.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11320399 + ... + 11334257.

It is an arithmetic number, because the mean of its divisors is an integer number (3187204020).

Almost surely, 2^156985438752 is an apocalyptic number.

156985438752 is a gapful number since it is divisible by the number (12) 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 156985438752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229478689440).

156985438752 is an abundant number, since it is smaller than the sum of its proper divisors (301971940128).

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

156985438752 is a wasteful number, since it uses less digits than its factorization.

156985438752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14975 (or 14964 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 63.

The spelling of 156985438752 in words is "one hundred fifty-six billion, nine hundred eighty-five million, four hundred thirty-eight thousand, seven hundred fifty-two".