77557240640217 has 32 divisors (see below), whose sum is σ = 116219352243456. Its totient is φ = 45647242502400.

The previous prime is 77557240640137. The next prime is 77557240640221. The reversal of 77557240640217 is 71204604275577.

77557240640217 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 77557240640217 - 2³⁰ = 77556166898393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77557240640017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3011467 + ... + 12813407.

It is an arithmetic number, because the mean of its divisors is an integer number (3631854757608).

Almost surely, 2^{77557240640217} is an apocalyptic number.

It is an amenable number.

77557240640217 is a deficient number, since it is larger than the sum of its proper divisors (38662111603239).

77557240640217 is a wasteful number, since it uses less digits than its factorization.

77557240640217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9810801.

The product of its (nonzero) digits is 23049600, while the sum is 57.

The spelling of 77557240640217 in words is "seventy-seven trillion, five hundred fifty-seven billion, two hundred forty million, six hundred forty thousand, two hundred seventeen".