155231459712 has 384 divisors, whose sum is σ = 544190400000. Its totient is φ = 41460940800.

The previous prime is 155231459711. The next prime is 155231459717. The reversal of 155231459712 is 217954132551.

155231459712 is a `hidden beast` number, since 1 + 5 + 52 + 3 + 1 + 4 + 597 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155231459711) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20696539 + ... + 20704037.

It is an arithmetic number, because the mean of its divisors is an integer number (1417162500).

Almost surely, 2^155231459712 is an apocalyptic number.

155231459712 is a gapful number since it is divisible by the number (12) 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 155231459712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272095200000).

155231459712 is an abundant number, since it is smaller than the sum of its proper divisors (388958940288).

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

155231459712 is a wasteful number, since it uses less digits than its factorization.

155231459712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7694 (or 7679 counting only the distinct ones).

The product of its digits is 378000, while the sum is 45.

The spelling of 155231459712 in words is "one hundred fifty-five billion, two hundred thirty-one million, four hundred fifty-nine thousand, seven hundred twelve".