155155015240 has 64 divisors (see below), whose sum is σ = 355584116160. Its totient is φ = 60913432320.

The previous prime is 155155015229. The next prime is 155155015241. The reversal of 155155015240 is 42510551551.

155155015240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 155155015196 and 155155015205.

It is not an unprimeable number, because it can be changed into a prime (155155015241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1071399 + ... + 1207561.

It is an arithmetic number, because the mean of its divisors is an integer number (5556001815).

Almost surely, 2^155155015240 is an apocalyptic number.

155155015240 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 155155015240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177792058080).

155155015240 is an abundant number, since it is smaller than the sum of its proper divisors (200429100920).

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

155155015240 is a wasteful number, since it uses less digits than its factorization.

155155015240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136702 (or 136698 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 34.

Adding to 155155015240 its reverse (42510551551), we get a palindrome (197665566791).

The spelling of 155155015240 in words is "one hundred fifty-five billion, one hundred fifty-five million, fifteen thousand, two hundred forty".