77203609056 has 480 divisors, whose sum is σ = 276206293440. Its totient is φ = 20651065344.

The previous prime is 77203609051. The next prime is 77203609103. The reversal of 77203609056 is 65090630277.

It is a super-2 number, since 2×77203609056² (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 (77203609051) 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 79 ways as a sum of consecutive naturals, for example, 70634046 + ... + 70635138.

It is an arithmetic number, because the mean of its divisors is an integer number (575429778).

Almost surely, 2^77203609056 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 77203609056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138103146720).

77203609056 is an abundant number, since it is smaller than the sum of its proper divisors (199002684384).

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

77203609056 is a wasteful number, since it uses less digits than its factorization.

77203609056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368 (or 1351 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 45.

The spelling of 77203609056 in words is "seventy-seven billion, two hundred three million, six hundred nine thousand, fifty-six".