8077791745 has 16 divisors (see below), whose sum is σ = 9987241680. Its totient is φ = 6269046784.

The previous prime is 8077791739. The next prime is 8077791769. The reversal of 8077791745 is 5471977708.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 832207104 + 7245584641 = 28848^2 + 85121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8077791745 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147664 + ... + 194833.

It is an arithmetic number, because the mean of its divisors is an integer number (624202605).

Almost surely, 2^8077791745 is an apocalyptic number.

It is an amenable number.

8077791745 is a deficient number, since it is larger than the sum of its proper divisors (1909449935).

8077791745 is a wasteful number, since it uses less digits than its factorization.

8077791745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342644.

The product of its (nonzero) digits is 3457440, while the sum is 55.

The square root of 8077791745 is about 89876.5361203913. The cubic root of 8077791745 is about 2006.4617458532.

The spelling of 8077791745 in words is "eight billion, seventy-seven million, seven hundred ninety-one thousand, seven hundred forty-five".