77156081718 has 64 divisors (see below), whose sum is σ = 162001002240. Its totient is φ = 24465184128.

The previous prime is 77156081711. The next prime is 77156081719. The reversal of 77156081718 is 81718065177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77156081711) 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 31 ways as a sum of consecutive naturals, for example, 5379705 + ... + 5394027.

It is an arithmetic number, because the mean of its divisors is an integer number (2531265660).

Almost surely, 2^77156081718 is an apocalyptic number.

77156081718 is an abundant number, since it is smaller than the sum of its proper divisors (84844920522).

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

77156081718 is a wasteful number, since it uses less digits than its factorization.

77156081718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14813.

The product of its (nonzero) digits is 658560, while the sum is 51.

The spelling of 77156081718 in words is "seventy-seven billion, one hundred fifty-six million, eighty-one thousand, seven hundred eighteen".