77741660213247 has 16 divisors (see below), whose sum is σ = 109112096459520. Its totient is φ = 49099548441600.

The previous prime is 77741660213153. The next prime is 77741660213249. The reversal of 77741660213247 is 74231206614777.

It is a happy number.

It is not a de Polignac number, because 77741660213247 - 2²⁰ = 77741659164671 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77741660213249) 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, 150847 + ... + 12470207.

It is an arithmetic number, because the mean of its divisors is an integer number (6819506028720).

Almost surely, 2^{77741660213247} is an apocalyptic number.

77741660213247 is a deficient number, since it is larger than the sum of its proper divisors (31370436246273).

77741660213247 is a wasteful number, since it uses less digits than its factorization.

77741660213247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12430094.

The product of its (nonzero) digits is 16595712, while the sum is 57.

The spelling of 77741660213247 in words is "seventy-seven trillion, seven hundred forty-one billion, six hundred sixty million, two hundred thirteen thousand, two hundred forty-seven".