77734617728417 has 16 divisors (see below), whose sum is σ = 85030204456512. Its totient is φ = 70628708462400.

The previous prime is 77734617728413. The next prime is 77734617728497. The reversal of 77734617728417 is 71482771643777.

It is a cyclic number.

It is not a de Polignac number, because 77734617728417 - 2² = 77734617728413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77734617728413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33831959 + ... + 36056492.

It is an arithmetic number, because the mean of its divisors is an integer number (5314387778532).

Almost surely, 2^{77734617728417} is an apocalyptic number.

It is an amenable number.

77734617728417 is a deficient number, since it is larger than the sum of its proper divisors (7295586728095).

77734617728417 is a wasteful number, since it uses less digits than its factorization.

77734617728417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69889808.

The product of its digits is 542126592, while the sum is 71.

The spelling of 77734617728417 in words is "seventy-seven trillion, seven hundred thirty-four billion, six hundred seventeen million, seven hundred twenty-eight thousand, four hundred seventeen".