77705517340 has 48 divisors (see below), whose sum is σ = 180934606944. Its totient is φ = 27793324800.

The previous prime is 77705517317. The next prime is 77705517343. The reversal of 77705517340 is 4371550777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77705517343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2881719 + ... + 2908558.

It is an arithmetic number, because the mean of its divisors is an integer number (3769470978).

Almost surely, 2^77705517340 is an apocalyptic number.

It is an amenable number.

77705517340 is an abundant number, since it is smaller than the sum of its proper divisors (103229089604).

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

77705517340 is a wasteful number, since it uses less digits than its factorization.

77705517340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5790358 (or 5790356 counting only the distinct ones).

The product of its (nonzero) digits is 720300, while the sum is 46.

The spelling of 77705517340 in words is "seventy-seven billion, seven hundred five million, five hundred seventeen thousand, three hundred forty".