77312214020 has 12 divisors (see below), whose sum is σ = 162355649484. Its totient is φ = 30924885600.

The previous prime is 77312213999. The next prime is 77312214041. The reversal of 77312214020 is 2041221377.

It is an interprime number because it is at equal distance from previous prime (77312213999) and next prime (77312214041).

It can be written as a sum of positive squares in 2 ways, for example, as 9932514244 + 67379699776 = 99662^2 + 259576^2 .

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, 1932805331 + ... + 1932805370.

It is an arithmetic number, because the mean of its divisors is an integer number (13529637457).

Almost surely, 2^77312214020 is an apocalyptic number.

It is an amenable number.

77312214020 is an abundant number, since it is smaller than the sum of its proper divisors (85043435464).

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

77312214020 is a wasteful number, since it uses less digits than its factorization.

77312214020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3865610710 (or 3865610708 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

Adding to 77312214020 its reverse (2041221377), we get a palindrome (79353435397).

The spelling of 77312214020 in words is "seventy-seven billion, three hundred twelve million, two hundred fourteen thousand, twenty".