77696199220 has 36 divisors (see below), whose sum is σ = 173324371500. Its totient is φ = 29250331648.

The previous prime is 77696199197. The next prime is 77696199233. The reversal of 77696199220 is 2299169677.

It can be written as a sum of positive squares in 6 ways, for example, as 13736777616 + 63959421604 = 117204^2 + 252902^2 .

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 6715345 + ... + 6726904.

It is an arithmetic number, because the mean of its divisors is an integer number (4814565875).

Almost surely, 2^77696199220 is an apocalyptic number.

It is an amenable number.

77696199220 is an abundant number, since it is smaller than the sum of its proper divisors (95628172280).

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

77696199220 is a wasteful number, since it uses less digits than its factorization.

77696199220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13442292 (or 13442273 counting only the distinct ones).

The product of its (nonzero) digits is 5143824, while the sum is 58.

The spelling of 77696199220 in words is "seventy-seven billion, six hundred ninety-six million, one hundred ninety-nine thousand, two hundred twenty".