746560645321 has 4 divisors (see below), whose sum is σ = 746569117332. Its totient is φ = 746552173312.

The previous prime is 746560645319. The next prime is 746560645361. The reversal of 746560645321 is 123546065647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123546065647 = 176591 ⋅699617.

It can be written as a sum of positive squares in 2 ways, for example, as 346585351225 + 399975294096 = 588715^2 + 632436^2 .

It is a cyclic number.

It is not a de Polignac number, because 746560645321 - 2¹ = 746560645319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (746560645361) 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, 4102420 + ... + 4280533.

It is an arithmetic number, because the mean of its divisors is an integer number (186642279333).

Almost surely, 2^746560645321 is an apocalyptic number.

It is an amenable number.

746560645321 is a deficient number, since it is larger than the sum of its proper divisors (8472011).

746560645321 is an equidigital number, since it uses as much as digits as its factorization.

746560645321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8472010.

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 746560645321 in words is "seven hundred forty-six billion, five hundred sixty million, six hundred forty-five thousand, three hundred twenty-one".