156238225920 has 640 divisors, whose sum is σ = 640983974400. Its totient is φ = 35332816896.

The previous prime is 156238225831. The next prime is 156238225993. The reversal of 156238225920 is 29522832651.

156238225920 is a `hidden beast` number, since 1 + 5 + 6 + 2 + 38 + 22 + 592 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46930816 + ... + 46934144.

It is an arithmetic number, because the mean of its divisors is an integer number (1001537460).

Almost surely, 2^156238225920 is an apocalyptic number.

156238225920 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 156238225920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320491987200).

156238225920 is an abundant number, since it is smaller than the sum of its proper divisors (484745748480).

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

156238225920 is an equidigital number, since it uses as much as digits as its factorization.

156238225920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3465 (or 3443 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 156238225920 in words is "one hundred fifty-six billion, two hundred thirty-eight million, two hundred twenty-five thousand, nine hundred twenty".