77273891136 has 336 divisors, whose sum is σ = 261926368704. Its totient is φ = 22376964096.

The previous prime is 77273891117. The next prime is 77273891147. The reversal of 77273891136 is 63119837277.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3425751 + ... + 3448233.

It is an arithmetic number, because the mean of its divisors is an integer number (779542764).

Almost surely, 2^77273891136 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 77273891136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130963184352).

77273891136 is an abundant number, since it is smaller than the sum of its proper divisors (184652477568).

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

77273891136 is a wasteful number, since it uses less digits than its factorization.

77273891136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22540 (or 22518 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The spelling of 77273891136 in words is "seventy-seven billion, two hundred seventy-three million, eight hundred ninety-one thousand, one hundred thirty-six".