215593961064 has 128 divisors (see below), whose sum is σ = 556554240000. Its totient is φ = 69554951424.

The previous prime is 215593961057. The next prime is 215593961083. The reversal of 215593961064 is 460169395512.

It is a junction number, because it is equal to n+sod(n) for n = 215593960998 and 215593961016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74883577 + ... + 74886455.

It is an arithmetic number, because the mean of its divisors is an integer number (4348080000).

Almost surely, 2^215593961064 is an apocalyptic number.

215593961064 is a gapful number since it is divisible by the number (24) 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 215593961064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278277120000).

215593961064 is an abundant number, since it is smaller than the sum of its proper divisors (340960278936).

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

215593961064 is a wasteful number, since it uses less digits than its factorization.

215593961064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567 (or 3563 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 51.

The spelling of 215593961064 in words is "two hundred fifteen billion, five hundred ninety-three million, nine hundred sixty-one thousand, sixty-four".