220773430640 has 40 divisors (see below), whose sum is σ = 586626545760. Its totient is φ = 75693747456.

The previous prime is 220773430597. The next prime is 220773430663. The reversal of 220773430640 is 46034377022.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 220773430594 and 220773430603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197118575 + ... + 197119694.

It is an arithmetic number, because the mean of its divisors is an integer number (14665663644).

Almost surely, 2^220773430640 is an apocalyptic number.

220773430640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220773430640 is an abundant number, since it is smaller than the sum of its proper divisors (365853115120).

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

220773430640 is a wasteful number, since it uses less digits than its factorization.

220773430640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394238289 (or 394238283 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 38.

The spelling of 220773430640 in words is "two hundred twenty billion, seven hundred seventy-three million, four hundred thirty thousand, six hundred forty".