73778362220 has 24 divisors (see below), whose sum is σ = 164048359104. Its totient is φ = 27775383296.

The previous prime is 73778362199. The next prime is 73778362277. The reversal of 73778362220 is 2226387737.

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, 108497252 + ... + 108497931.

It is an arithmetic number, because the mean of its divisors is an integer number (6835348296).

Almost surely, 2^73778362220 is an apocalyptic number.

It is an amenable number.

73778362220 is an abundant number, since it is smaller than the sum of its proper divisors (90269996884).

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

73778362220 is a wasteful number, since it uses less digits than its factorization.

73778362220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216995209 (or 216995207 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 47.

The spelling of 73778362220 in words is "seventy-three billion, seven hundred seventy-eight million, three hundred sixty-two thousand, two hundred twenty".