155425221342720 has 1600 divisors, whose sum is σ = 641961437838336. Its totient is φ = 35206025379840.

The previous prime is 155425221342697. The next prime is 155425221342733. The reversal of 155425221342720 is 27243122524551.

155425221342720 is a `hidden beast` number, since 1 + 5 + 5 + 4 + 2 + 5 + 2 + 213 + 427 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 102052015879 + ... + 102052017401.

Almost surely, 2^{155425221342720} is an apocalyptic number.

155425221342720 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 155425221342720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320980718919168).

155425221342720 is an abundant number, since it is smaller than the sum of its proper divisors (486536216495616).

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

155425221342720 is a wasteful number, since it uses less digits than its factorization.

155425221342720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153 (or 2128 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 45.

The spelling of 155425221342720 in words is "one hundred fifty-five trillion, four hundred twenty-five billion, two hundred twenty-one million, three hundred forty-two thousand, seven hundred twenty".