155308252917120 has 512 divisors, whose sum is σ = 526453053696000. Its totient is φ = 38809349652480.

The previous prime is 155308252917113. The next prime is 155308252917149. The reversal of 155308252917120 is 21719252803551.

It is a happy number.

It is a super-2 number, since 2×155308252917120² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30458568331 + ... + 30458573429.

It is an arithmetic number, because the mean of its divisors is an integer number (1028228620500).

Almost surely, 2^{155308252917120} is an apocalyptic number.

155308252917120 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 155308252917120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263226526848000).

155308252917120 is an abundant number, since it is smaller than the sum of its proper divisors (371144800778880).

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

155308252917120 is a wasteful number, since it uses less digits than its factorization.

155308252917120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9026 (or 9014 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 51.

The spelling of 155308252917120 in words is "one hundred fifty-five trillion, three hundred eight billion, two hundred fifty-two million, nine hundred seventeen thousand, one hundred twenty".