77764011580840 has 96 divisors (see below), whose sum is σ = 189616685681880. Its totient is φ = 28689651035136.

The previous prime is 77764011580781. The next prime is 77764011580873. The reversal of 77764011580840 is 4808511046777.

It can be written as a sum of positive squares in 12 ways, for example, as 3387565405156 + 74376446175684 = 1840534^2 + 8624178^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3712342 + ... + 13011898.

Almost surely, 2^{77764011580840} 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 77764011580840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94808342840940).

77764011580840 is an abundant number, since it is smaller than the sum of its proper divisors (111852674101040).

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

77764011580840 is a wasteful number, since it uses less digits than its factorization.

77764011580840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9300831 (or 9300814 counting only the distinct ones).

The product of its (nonzero) digits is 10536960, while the sum is 58.

The spelling of 77764011580840 in words is "seventy-seven trillion, seven hundred sixty-four billion, eleven million, five hundred eighty thousand, eight hundred forty".