155973072000 has 384 divisors, whose sum is σ = 528645012480. Its totient is φ = 40680192000.

The previous prime is 155973071993. The next prime is 155973072019. The reversal of 155973072000 is 270379551.

It is a tau number, because it is divible by the number of its divisors (384).

It is a self number, because there is not a number n which added to its sum of digits gives 155973072000.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106031265 + ... + 106032735.

It is an arithmetic number, because the mean of its divisors is an integer number (1376679720).

Almost surely, 2^155973072000 is an apocalyptic number.

155973072000 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 155973072000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264322506240).

155973072000 is an abundant number, since it is smaller than the sum of its proper divisors (372671940480).

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

155973072000 is an equidigital number, since it uses as much as digits as its factorization.

155973072000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597 (or 1528 counting only the distinct ones).

The product of its (nonzero) digits is 66150, while the sum is 39.

The spelling of 155973072000 in words is "one hundred fifty-five billion, nine hundred seventy-three million, seventy-two thousand".