1780745146723 has 8 divisors (see below), whose sum is σ = 1785123360720. Its totient is φ = 1776367544160.

The previous prime is 1780745146703. The next prime is 1780745146751. The reversal of 1780745146723 is 3276415470871.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1780745146723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1780745146703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5980861 + ... + 6271537.

It is an arithmetic number, because the mean of its divisors is an integer number (223140420090).

Almost surely, 2^{1780745146723} is an apocalyptic number.

1780745146723 is a deficient number, since it is larger than the sum of its proper divisors (4378213997).

1780745146723 is a wasteful number, since it uses less digits than its factorization.

1780745146723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305717.

The product of its (nonzero) digits is 7902720, while the sum is 55.

The spelling of 1780745146723 in words is "one trillion, seven hundred eighty billion, seven hundred forty-five million, one hundred forty-six thousand, seven hundred twenty-three".