785490351440321 has 4 divisors (see below), whose sum is σ = 802202912109312. Its totient is φ = 768777790771332.

The previous prime is 785490351440303. The next prime is 785490351440323. The reversal of 785490351440321 is 123044153094587.

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 a de Polignac number, because none of the positive numbers 2^k-785490351440321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (785490351440323) 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, 8356280334425 + ... + 8356280334518.

It is an arithmetic number, because the mean of its divisors is an integer number (200550728027328).

Almost surely, 2^{785490351440321} is an apocalyptic number.

It is an amenable number.

785490351440321 is a deficient number, since it is larger than the sum of its proper divisors (16712560668991).

785490351440321 is a wasteful number, since it uses less digits than its factorization.

785490351440321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16712560668990.

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 785490351440321 in words is "seven hundred eighty-five trillion, four hundred ninety billion, three hundred fifty-one million, four hundred forty thousand, three hundred twenty-one".