77317061892 has 96 divisors (see below), whose sum is σ = 207846723840. Its totient is φ = 21912145920.

The previous prime is 77317061891. The next prime is 77317061897. The reversal of 77317061892 is 29816071377.

It is a super-2 number, since 2×77317061892² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77317061891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24867234 + ... + 24870342.

It is an arithmetic number, because the mean of its divisors is an integer number (2165070040).

Almost surely, 2^77317061892 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77317061892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103923361920).

77317061892 is an abundant number, since it is smaller than the sum of its proper divisors (130529661948).

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

77317061892 is a wasteful number, since it uses less digits than its factorization.

77317061892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421 (or 5419 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 51.

The spelling of 77317061892 in words is "seventy-seven billion, three hundred seventeen million, sixty-one thousand, eight hundred ninety-two".