77071733320 has 64 divisors (see below), whose sum is σ = 174669663600. Its totient is φ = 30605352960.

The previous prime is 77071733317. The next prime is 77071733329. The reversal of 77071733320 is 2333717077.

It can be written as a sum of positive squares in 8 ways, for example, as 35510387364 + 41561345956 = 188442^2 + 203866^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (77071733329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8090160 + ... + 8099680.

Almost surely, 2^77071733320 is an apocalyptic number.

It is an amenable number.

77071733320 is an abundant number, since it is smaller than the sum of its proper divisors (97597930280).

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

77071733320 is a wasteful number, since it uses less digits than its factorization.

77071733320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10978 (or 10974 counting only the distinct ones).

The product of its (nonzero) digits is 129654, while the sum is 40.

The spelling of 77071733320 in words is "seventy-seven billion, seventy-one million, seven hundred thirty-three thousand, three hundred twenty".