220645496394 has 48 divisors (see below), whose sum is σ = 495942475392. Its totient is φ = 73523114208.

The previous prime is 220645496377. The next prime is 220645496413. The reversal of 220645496394 is 493694546022.

220645496394 is a `hidden beast` number, since 2 + 2 + 0 + 6 + 4 + 549 + 6 + 3 + 94 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 220645496394.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1358287 + ... + 1512029.

It is an arithmetic number, because the mean of its divisors is an integer number (10332134904).

Almost surely, 2^220645496394 is an apocalyptic number.

220645496394 is an abundant number, since it is smaller than the sum of its proper divisors (275296978998).

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

220645496394 is a wasteful number, since it uses less digits than its factorization.

220645496394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156713 (or 156701 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 54.

The spelling of 220645496394 in words is "two hundred twenty billion, six hundred forty-five million, four hundred ninety-six thousand, three hundred ninety-four".