77135441791 has 4 divisors (see below), whose sum is σ = 77597330832. Its totient is φ = 76673552752.

The previous prime is 77135441737. The next prime is 77135441797. The reversal of 77135441791 is 19714453177.

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

It is a cyclic number.

It is not a de Polignac number, because 77135441791 - 2¹⁵ = 77135409023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77135441797) 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, 230944270 + ... + 230944603.

It is an arithmetic number, because the mean of its divisors is an integer number (19399332708).

Almost surely, 2^77135441791 is an apocalyptic number.

77135441791 is a deficient number, since it is larger than the sum of its proper divisors (461889041).

77135441791 is a wasteful number, since it uses less digits than its factorization.

77135441791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461889040.

The product of its digits is 740880, while the sum is 49.

The spelling of 77135441791 in words is "seventy-seven billion, one hundred thirty-five million, four hundred forty-one thousand, seven hundred ninety-one".