77226545220 has 192 divisors, whose sum is σ = 240482027520. Its totient is φ = 18360115200.

The previous prime is 77226545213. The next prime is 77226545233. The reversal of 77226545220 is 2254562277.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9039711 + ... + 9048249.

It is an arithmetic number, because the mean of its divisors is an integer number (1252510560).

Almost surely, 2^77226545220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77226545220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120241013760).

77226545220 is an abundant number, since it is smaller than the sum of its proper divisors (163255482300).

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

77226545220 is a wasteful number, since it uses less digits than its factorization.

77226545220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8826 (or 8824 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 42.

The spelling of 77226545220 in words is "seventy-seven billion, two hundred twenty-six million, five hundred forty-five thousand, two hundred twenty".