215445545120 has 96 divisors (see below), whose sum is σ = 580386997008. Its totient is φ = 74869751808.

The previous prime is 215445545111. The next prime is 215445545129. The reversal of 215445545120 is 21545544512.

It is an interprime number because it is at equal distance from previous prime (215445545111) and next prime (215445545129).

It can be written as a sum of positive squares in 8 ways, for example, as 53381329936 + 162064215184 = 231044^2 + 402572^2 .

It is not an unprimeable number, because it can be changed into a prime (215445545129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3011099 + ... + 3081818.

Almost surely, 2^215445545120 is an apocalyptic number.

215445545120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215445545120 is an abundant number, since it is smaller than the sum of its proper divisors (364941451888).

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

215445545120 is a wasteful number, since it uses less digits than its factorization.

215445545120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6092962 (or 6092954 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 38.

The spelling of 215445545120 in words is "two hundred fifteen billion, four hundred forty-five million, five hundred forty-five thousand, one hundred twenty".