77022120420 has 144 divisors (see below), whose sum is σ = 270668012160. Its totient is φ = 17363870208.

The previous prime is 77022120419. The next prime is 77022120433. The reversal of 77022120420 is 2402122077.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 326710 + ... + 510669.

Almost surely, 2^77022120420 is an apocalyptic number.

77022120420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77022120420 is an abundant number, since it is smaller than the sum of its proper divisors (193645891740).

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

77022120420 is a wasteful number, since it uses less digits than its factorization.

77022120420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837474 (or 837469 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

Adding to 77022120420 its reverse (2402122077), we get a palindrome (79424242497).

The spelling of 77022120420 in words is "seventy-seven billion, twenty-two million, one hundred twenty thousand, four hundred twenty".