155129425280 has 32 divisors (see below), whose sum is σ = 370856283840. Its totient is φ = 62051769856.

The previous prime is 155129425261. The next prime is 155129425307. The reversal of 155129425280 is 82524921551.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-3 number, since 3×155129425280³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121194224 + ... + 121195503.

It is an arithmetic number, because the mean of its divisors is an integer number (11589258870).

Almost surely, 2^155129425280 is an apocalyptic number.

155129425280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155129425280 is an abundant number, since it is smaller than the sum of its proper divisors (215726858560).

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

155129425280 is an equidigital number, since it uses as much as digits as its factorization.

155129425280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242389746 (or 242389734 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 155129425280 in words is "one hundred fifty-five billion, one hundred twenty-nine million, four hundred twenty-five thousand, two hundred eighty".