155581428000 has 192 divisors, whose sum is σ = 510092698752. Its totient is φ = 41455180800.

The previous prime is 155581427923. The next prime is 155581428001. The reversal of 155581428000 is 824185551.

It is a self number, because there is not a number n which added to its sum of digits gives 155581428000.

It is not an unprimeable number, because it can be changed into a prime (155581428001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17431539 + ... + 17440461.

It is an arithmetic number, because the mean of its divisors is an integer number (2656732806).

Almost surely, 2^155581428000 is an apocalyptic number.

155581428000 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 155581428000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255046349376).

155581428000 is an abundant number, since it is smaller than the sum of its proper divisors (354511270752).

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

155581428000 is a wasteful number, since it uses less digits than its factorization.

155581428000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10404 (or 10386 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 39.

The spelling of 155581428000 in words is "one hundred fifty-five billion, five hundred eighty-one million, four hundred twenty-eight thousand".