77149822220 has 12 divisors (see below), whose sum is σ = 162014626704. Its totient is φ = 30859928880.

The previous prime is 77149822201. The next prime is 77149822249. The reversal of 77149822220 is 2222894177.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1928745536 + ... + 1928745575.

It is an arithmetic number, because the mean of its divisors is an integer number (13501218892).

Almost surely, 2^77149822220 is an apocalyptic number.

It is an amenable number.

77149822220 is an abundant number, since it is smaller than the sum of its proper divisors (84864804484).

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

77149822220 is a wasteful number, since it uses less digits than its factorization.

77149822220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857491120 (or 3857491118 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 77149822220 in words is "seventy-seven billion, one hundred forty-nine million, eight hundred twenty-two thousand, two hundred twenty".