77078538717 has 8 divisors (see below), whose sum is σ = 104305286496. Its totient is φ = 50618741712.

The previous prime is 77078538709. The next prime is 77078538737. The reversal of 77078538717 is 71783587077.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77078538717 - 2³ = 77078538709 is a prime.

It is a super-2 number, since 2×77078538717² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77078538737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191737458 + ... + 191737859.

It is an arithmetic number, because the mean of its divisors is an integer number (13038160812).

Almost surely, 2^77078538717 is an apocalyptic number.

It is an amenable number.

77078538717 is a deficient number, since it is larger than the sum of its proper divisors (27226747779).

77078538717 is a wasteful number, since it uses less digits than its factorization.

77078538717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383475387.

The product of its (nonzero) digits is 16134720, while the sum is 60.

The spelling of 77078538717 in words is "seventy-seven billion, seventy-eight million, five hundred thirty-eight thousand, seven hundred seventeen".