1345539247777 has 2 divisors, whose sum is σ = 1345539247778. Its totient is φ = 1345539247776.

The previous prime is 1345539247711. The next prime is 1345539247849. The reversal of 1345539247777 is 7777429355431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 692571819681 + 652967428096 = 832209^2 + 808064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345539247777 is a prime.

It is not a weakly prime, because it can be changed into another prime (1345539217777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672769623888 + 672769623889.

It is an arithmetic number, because the mean of its divisors is an integer number (672769623889).

Almost surely, 2^{1345539247777} is an apocalyptic number.

It is an amenable number.

1345539247777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345539247777 is an equidigital number, since it uses as much as digits as its factorization.

1345539247777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155584800, while the sum is 64.

The spelling of 1345539247777 in words is "one trillion, three hundred forty-five billion, five hundred thirty-nine million, two hundred forty-seven thousand, seven hundred seventy-seven".