220640971709640 has 128 divisors (see below), whose sum is σ = 696998058624000. Its totient is φ = 55721909438208.

The previous prime is 220640971709597. The next prime is 220640971709663. The reversal of 220640971709640 is 46907179046022.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9762564 + ... + 23164403.

It is an arithmetic number, because the mean of its divisors is an integer number (5445297333000).

Almost surely, 2^{220640971709640} is an apocalyptic number.

220640971709640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220640971709640 is an abundant number, since it is smaller than the sum of its proper divisors (476357086914360).

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

220640971709640 is a wasteful number, since it uses less digits than its factorization.

220640971709640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32929939 (or 32929935 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 57.

The spelling of 220640971709640 in words is "two hundred twenty trillion, six hundred forty billion, nine hundred seventy-one million, seven hundred nine thousand, six hundred forty".