1345811819977 has 2 divisors, whose sum is σ = 1345811819978. Its totient is φ = 1345811819976.

The previous prime is 1345811819959. The next prime is 1345811819999. The reversal of 1345811819977 is 7799181185431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 715477447881 + 630334372096 = 845859^2 + 793936^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345811819977 - 2¹⁵ = 1345811787209 is a prime.

It is a super-3 number, since 3×1345811819977³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1345811819777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672905909988 + 672905909989.

It is an arithmetic number, because the mean of its divisors is an integer number (672905909989).

Almost surely, 2^{1345811819977} is an apocalyptic number.

It is an amenable number.

1345811819977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345811819977 is an equidigital number, since it uses as much as digits as its factorization.

1345811819977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 64.

The spelling of 1345811819977 in words is "one trillion, three hundred forty-five billion, eight hundred eleven million, eight hundred nineteen thousand, nine hundred seventy-seven".