1220208003864 has 80 divisors (see below), whose sum is σ = 3417957615600. Its totient is φ = 406706799168.

The previous prime is 1220208003737. The next prime is 1220208003877. The reversal of 1220208003864 is 4683008020221.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10157302 + ... + 10276730.

It is an arithmetic number, because the mean of its divisors is an integer number (42724470195).

Almost surely, 2^{1220208003864} is an apocalyptic number.

It is an amenable number.

1220208003864 is an abundant number, since it is smaller than the sum of its proper divisors (2197749611736).

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

1220208003864 is a wasteful number, since it uses less digits than its factorization.

1220208003864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135214 (or 135201 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 1220208003864 in words is "one trillion, two hundred twenty billion, two hundred eight million, three thousand, eight hundred sixty-four".