77227808365 has 8 divisors (see below), whose sum is σ = 92676008088. Its totient is φ = 61780488000.

The previous prime is 77227808363. The next prime is 77227808387. The reversal of 77227808365 is 56380872277.

It can be written as a sum of positive squares in 4 ways, for example, as 41284956969 + 35942851396 = 203187^2 + 189586^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77227808365 - 2¹ = 77227808363 is a prime.

It is a super-2 number, since 2×77227808365² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77227808363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8082 + ... + 393091.

It is an arithmetic number, because the mean of its divisors is an integer number (11584501011).

Almost surely, 2^77227808365 is an apocalyptic number.

It is an amenable number.

77227808365 is a deficient number, since it is larger than the sum of its proper divisors (15448199723).

77227808365 is a wasteful number, since it uses less digits than its factorization.

77227808365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439679.

The product of its (nonzero) digits is 7902720, while the sum is 55.

The spelling of 77227808365 in words is "seventy-seven billion, two hundred twenty-seven million, eight hundred eight thousand, three hundred sixty-five".