77311244747 has 12 divisors (see below), whose sum is σ = 86786534688. Its totient is φ = 68787562800.

The previous prime is 77311244723. The next prime is 77311244753. The reversal of 77311244747 is 74744211377.

It is a de Polignac number, because none of the positive numbers 2^k-77311244747 is a prime.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77311241747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6791504 + ... + 6802877.

It is an arithmetic number, because the mean of its divisors is an integer number (7232211224).

Almost surely, 2^77311244747 is an apocalyptic number.

77311244747 is a deficient number, since it is larger than the sum of its proper divisors (9475289941).

77311244747 is a wasteful number, since it uses less digits than its factorization.

77311244747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13594450 (or 13594439 counting only the distinct ones).

The product of its digits is 921984, while the sum is 47.

The spelling of 77311244747 in words is "seventy-seven billion, three hundred eleven million, two hundred forty-four thousand, seven hundred forty-seven".