1345061661263 has 4 divisors (see below), whose sum is σ = 1349814529608. Its totient is φ = 1340308792920.

The previous prime is 1345061661259. The next prime is 1345061661277. The reversal of 1345061661263 is 3621661605431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1345061661263 - 2² = 1345061661259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345061661233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2376433748 + ... + 2376434313.

It is an arithmetic number, because the mean of its divisors is an integer number (337453632402).

Almost surely, 2^{1345061661263} is an apocalyptic number.

1345061661263 is a deficient number, since it is larger than the sum of its proper divisors (4752868345).

1345061661263 is an equidigital number, since it uses as much as digits as its factorization.

1345061661263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4752868344.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 1345061661263 in words is "one trillion, three hundred forty-five billion, sixty-one million, six hundred sixty-one thousand, two hundred sixty-three".