155813105280 has 256 divisors, whose sum is σ = 568813363200. Its totient is φ = 35538604032.

The previous prime is 155813105263. The next prime is 155813105299. The reversal of 155813105280 is 82501318551.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6425659 + ... + 6449861.

It is an arithmetic number, because the mean of its divisors is an integer number (2221927200).

Almost surely, 2^155813105280 is an apocalyptic number.

155813105280 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 155813105280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284406681600).

155813105280 is an abundant number, since it is smaller than the sum of its proper divisors (413000257920).

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

155813105280 is a wasteful number, since it uses less digits than its factorization.

155813105280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24711 (or 24699 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 39.

The spelling of 155813105280 in words is "one hundred fifty-five billion, eight hundred thirteen million, one hundred five thousand, two hundred eighty".