215015120544 has 96 divisors (see below), whose sum is σ = 647374605696. Its totient is φ = 61211059200.

The previous prime is 215015120513. The next prime is 215015120557. The reversal of 215015120544 is 445021510512.

215015120544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

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, 391407 + ... + 763694.

It is an arithmetic number, because the mean of its divisors is an integer number (6743485476).

Almost surely, 2^215015120544 is an apocalyptic number.

215015120544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

215015120544 is an abundant number, since it is smaller than the sum of its proper divisors (432359485152).

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

215015120544 is a wasteful number, since it uses less digits than its factorization.

215015120544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155398 (or 1155390 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 215015120544 in words is "two hundred fifteen billion, fifteen million, one hundred twenty thousand, five hundred forty-four".