155115584077080 has 1024 divisors, whose sum is σ = 544981428633600. Its totient is φ = 34925094051840.

The previous prime is 155115584077079. The next prime is 155115584077183. The reversal of 155115584077080 is 80770485511551.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 155115584077080.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 211617440394 + ... + 211617441126.

It is an arithmetic number, because the mean of its divisors is an integer number (532208426400).

Almost surely, 2^{155115584077080} is an apocalyptic number.

155115584077080 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 155115584077080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272490714316800).

155115584077080 is an abundant number, since it is smaller than the sum of its proper divisors (389865844556520).

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

155115584077080 is a wasteful number, since it uses less digits than its factorization.

155115584077080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504 (or 1500 counting only the distinct ones).

The product of its (nonzero) digits is 7840000, while the sum is 57.

The spelling of 155115584077080 in words is "one hundred fifty-five trillion, one hundred fifteen billion, five hundred eighty-four million, seventy-seven thousand, eighty".