120256515225 has 144 divisors (see below), whose sum is σ = 282676193280. Its totient is φ = 47346249600.

The previous prime is 120256515221. The next prime is 120256515227. The reversal of 120256515225 is 522515652021.

120256515225 is a `hidden beast` number, since 1 + 20 + 2 + 565 + 1 + 52 + 25 = 666.

It is not a de Polignac number, because 120256515225 - 2² = 120256515221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120256515225.

It is not an unprimeable number, because it can be changed into a prime (120256515221) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 146512 + ... + 511838.

It is an arithmetic number, because the mean of its divisors is an integer number (1963029120).

Almost surely, 2^120256515225 is an apocalyptic number.

120256515225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120256515225 is an abundant number, since it is smaller than the sum of its proper divisors (162419678055).

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

120256515225 is a wasteful number, since it uses less digits than its factorization.

120256515225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365380 (or 365372 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 120256515225 in words is "one hundred twenty billion, two hundred fifty-six million, five hundred fifteen thousand, two hundred twenty-five".