155944028212320 has 192 divisors, whose sum is σ = 491943171605760. Its totient is φ = 41524177164288.

The previous prime is 155944028212183. The next prime is 155944028212321. The reversal of 155944028212320 is 23212820449551.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 155944028212320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155944028212321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5315232211 + ... + 5315261549.

It is an arithmetic number, because the mean of its divisors is an integer number (2562204018780).

Almost surely, 2^{155944028212320} is an apocalyptic number.

155944028212320 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 155944028212320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245971585802880).

155944028212320 is an abundant number, since it is smaller than the sum of its proper divisors (335999143393440).

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

155944028212320 is a wasteful number, since it uses less digits than its factorization.

155944028212320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45197 (or 45189 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 155944028212320 in words is "one hundred fifty-five trillion, nine hundred forty-four billion, twenty-eight million, two hundred twelve thousand, three hundred twenty".