77043776236 has 72 divisors (see below), whose sum is σ = 159750177216. Its totient is φ = 32409447840.

The previous prime is 77043776209. The next prime is 77043776237. The reversal of 77043776236 is 63267734077.

It is not an unprimeable number, because it can be changed into a prime (77043776237) 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 23 ways as a sum of consecutive naturals, for example, 3705991 + ... + 3726721.

Almost surely, 2^77043776236 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 77043776236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79875088608).

77043776236 is an abundant number, since it is smaller than the sum of its proper divisors (82706400980).

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

77043776236 is a wasteful number, since it uses less digits than its factorization.

77043776236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21099 (or 21090 counting only the distinct ones).

The product of its (nonzero) digits is 6223392, while the sum is 52.

The spelling of 77043776236 in words is "seventy-seven billion, forty-three million, seven hundred seventy-six thousand, two hundred thirty-six".