77443740771 has 16 divisors (see below), whose sum is σ = 109350885024. Its totient is φ = 48583908864.

The previous prime is 77443740769. The next prime is 77443740791. The reversal of 77443740771 is 17704734477.

It is not a de Polignac number, because 77443740771 - 2¹ = 77443740769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (77443740721) 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, 182121 + ... + 433653.

It is an arithmetic number, because the mean of its divisors is an integer number (6834430314).

Almost surely, 2^77443740771 is an apocalyptic number.

77443740771 is a deficient number, since it is larger than the sum of its proper divisors (31907144253).

77443740771 is a wasteful number, since it uses less digits than its factorization.

77443740771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257590.

The product of its (nonzero) digits is 3226944, while the sum is 51.

The spelling of 77443740771 in words is "seventy-seven billion, four hundred forty-three million, seven hundred forty thousand, seven hundred seventy-one".