220780783940 has 48 divisors (see below), whose sum is σ = 489778773120. Its totient is φ = 83366519040.

The previous prime is 220780783933. The next prime is 220780783981. The reversal of 220780783940 is 49387087022.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 927032 + ... + 1140591.

It is an arithmetic number, because the mean of its divisors is an integer number (10203724440).

Almost surely, 2^220780783940 is an apocalyptic number.

220780783940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220780783940 is an abundant number, since it is smaller than the sum of its proper divisors (268997989180).

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

220780783940 is a wasteful number, since it uses less digits than its factorization.

220780783940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067932 (or 2067930 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 220780783940 in words is "two hundred twenty billion, seven hundred eighty million, seven hundred eighty-three thousand, nine hundred forty".