77732775120 has 640 divisors, whose sum is σ = 325059194880. Its totient is φ = 14839971840.

The previous prime is 77732775119. The next prime is 77732775161. The reversal of 77732775120 is 2157723777.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 77732775120.

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 61741051 + ... + 61742309.

It is an arithmetic number, because the mean of its divisors is an integer number (507904992).

Almost surely, 2^77732775120 is an apocalyptic number.

77732775120 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77732775120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162529597440).

77732775120 is an abundant number, since it is smaller than the sum of its proper divisors (247326419760).

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

77732775120 is a wasteful number, since it uses less digits than its factorization.

77732775120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 1008420, while the sum is 48.

The spelling of 77732775120 in words is "seventy-seven billion, seven hundred thirty-two million, seven hundred seventy-five thousand, one hundred twenty".