1780945480069 has 32 divisors (see below), whose sum is σ = 2053148332032. Its totient is φ = 1513258200000.

The previous prime is 1780945480037. The next prime is 1780945480109. The reversal of 1780945480069 is 9600845490871.

It is a cyclic number.

It is not a de Polignac number, because 1780945480069 - 2⁵ = 1780945480037 is a prime.

It is a super-2 number, since 2×1780945480069² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1780945479989 and 1780945480016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1780940480069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 831827739 + ... + 831829879.

It is an arithmetic number, because the mean of its divisors is an integer number (64160885376).

Almost surely, 2^{1780945480069} is an apocalyptic number.

It is an amenable number.

1780945480069 is a deficient number, since it is larger than the sum of its proper divisors (272202851963).

1780945480069 is a wasteful number, since it uses less digits than its factorization.

1780945480069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4417.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 1780945480069 in words is "one trillion, seven hundred eighty billion, nine hundred forty-five million, four hundred eighty thousand, sixty-nine".