77694017017 has 4 divisors (see below), whose sum is σ = 77776935796. Its totient is φ = 77611098240.

The previous prime is 77694016979. The next prime is 77694017033. The reversal of 77694017017 is 71071049677.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44196232441 + 33497784576 = 210229^2 + 183024^2 .

It is a cyclic number.

It is not a de Polignac number, because 77694017017 - 2¹¹ = 77694014969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77694014017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41457984 + ... + 41459857.

It is an arithmetic number, because the mean of its divisors is an integer number (19444233949).

Almost surely, 2^77694017017 is an apocalyptic number.

It is an amenable number.

77694017017 is a deficient number, since it is larger than the sum of its proper divisors (82918779).

77694017017 is an equidigital number, since it uses as much as digits as its factorization.

77694017017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82918778.

The product of its (nonzero) digits is 518616, while the sum is 49.

The spelling of 77694017017 in words is "seventy-seven billion, six hundred ninety-four million, seventeen thousand, seventeen".