155145030012 has 144 divisors (see below), whose sum is σ = 475624094400. Its totient is φ = 41626238976.

The previous prime is 155145029947. The next prime is 155145030023. The reversal of 155145030012 is 210030541551.

155145030012 is a `hidden beast` number, since 155 + 1 + 4 + 503 + 0 + 0 + 1 + 2 = 666.

155145030012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1883188 + ... + 1963844.

It is an arithmetic number, because the mean of its divisors is an integer number (3302945100).

Almost surely, 2^155145030012 is an apocalyptic number.

155145030012 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 155145030012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237812047200).

155145030012 is an abundant number, since it is smaller than the sum of its proper divisors (320479064388).

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

155145030012 is a wasteful number, since it uses less digits than its factorization.

155145030012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81140 (or 81135 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 155145030012 its reverse (210030541551), we get a palindrome (365175571563).

The spelling of 155145030012 in words is "one hundred fifty-five billion, one hundred forty-five million, thirty thousand, twelve".