77129779002 has 16 divisors (see below), whose sum is σ = 158021986752. Its totient is φ = 25082854880.

The previous prime is 77129778989. The next prime is 77129779003. The reversal of 77129779002 is 20097792177.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (77129779003) 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 7 ways as a sum of consecutive naturals, for example, 156767598 + ... + 156768089.

It is an arithmetic number, because the mean of its divisors is an integer number (9876374172).

Almost surely, 2^77129779002 is an apocalyptic number.

77129779002 is an abundant number, since it is smaller than the sum of its proper divisors (80892207750).

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

77129779002 is a wasteful number, since it uses less digits than its factorization.

77129779002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313535733.

The product of its (nonzero) digits is 777924, while the sum is 51.

The spelling of 77129779002 in words is "seventy-seven billion, one hundred twenty-nine million, seven hundred seventy-nine thousand, two".