625246312321 has 4 divisors (see below), whose sum is σ = 633811330372. Its totient is φ = 616681294272.

The previous prime is 625246312309. The next prime is 625246312393. The reversal of 625246312321 is 123213642526.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 458403473025 + 166842839296 = 677055^2 + 408464^2 .

It is a cyclic number.

It is not a de Polignac number, because 625246312321 - 2⁵ = 625246312289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625246912321) 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, 4282508916 + ... + 4282509061.

It is an arithmetic number, because the mean of its divisors is an integer number (158452832593).

Almost surely, 2^625246312321 is an apocalyptic number.

It is an amenable number.

625246312321 is a deficient number, since it is larger than the sum of its proper divisors (8565018051).

625246312321 is an equidigital number, since it uses as much as digits as its factorization.

625246312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8565018050.

The product of its digits is 103680, while the sum is 37.

Adding to 625246312321 its reverse (123213642526), we get a palindrome (748459954847).

The spelling of 625246312321 in words is "six hundred twenty-five billion, two hundred forty-six million, three hundred twelve thousand, three hundred twenty-one".