78777289308 has 48 divisors (see below), whose sum is σ = 190697220000. Its totient is φ = 25280924928.

The previous prime is 78777289303. The next prime is 78777289309. The reversal of 78777289308 is 80398277787.

It is a super-2 number, since 2×78777289308² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78777289303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202863 + ... + 445766.

It is an arithmetic number, because the mean of its divisors is an integer number (3972858750).

Almost surely, 2^78777289308 is an apocalyptic number.

It is an amenable number.

78777289308 is an abundant number, since it is smaller than the sum of its proper divisors (111919930692).

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

78777289308 is a wasteful number, since it uses less digits than its factorization.

78777289308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649014 (or 649012 counting only the distinct ones).

The product of its (nonzero) digits is 66382848, while the sum is 66.

The spelling of 78777289308 in words is "seventy-eight billion, seven hundred seventy-seven million, two hundred eighty-nine thousand, three hundred eight".