1780802540813 has 4 divisors (see below), whose sum is σ = 1780813852608. Its totient is φ = 1780791229020.

The previous prime is 1780802540809. The next prime is 1780802540819. The reversal of 1780802540813 is 3180452080871.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1780802540813 - 2² = 1780802540809 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 (1780802540819) 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, 5416373 + ... + 5735738.

It is an arithmetic number, because the mean of its divisors is an integer number (445203463152).

Almost surely, 2^{1780802540813} is an apocalyptic number.

It is an amenable number.

1780802540813 is a deficient number, since it is larger than the sum of its proper divisors (11311795).

1780802540813 is a wasteful number, since it uses less digits than its factorization.

1780802540813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11311794.

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 1780802540813 in words is "one trillion, seven hundred eighty billion, eight hundred two million, five hundred forty thousand, eight hundred thirteen".