783745484665321 has 4 divisors (see below), whose sum is σ = 800420920509312. Its totient is φ = 767070048821332.

The previous prime is 783745484665303. The next prime is 783745484665331. The reversal of 783745484665321 is 123566484547387.

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 783745484665321 - 2¹⁵ = 783745484632553 is a prime.

It is a super-2 number, since 2×783745484665321² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (783745484665331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8337717921925 + ... + 8337717922018.

It is an arithmetic number, because the mean of its divisors is an integer number (200105230127328).

Almost surely, 2^{783745484665321} is an apocalyptic number.

It is an amenable number.

783745484665321 is a deficient number, since it is larger than the sum of its proper divisors (16675435843991).

783745484665321 is a wasteful number, since it uses less digits than its factorization.

783745484665321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16675435843990.

The product of its digits is 3251404800, while the sum is 73.

The spelling of 783745484665321 in words is "seven hundred eighty-three trillion, seven hundred forty-five billion, four hundred eighty-four million, six hundred sixty-five thousand, three hundred twenty-one".