625320630521 has 4 divisors (see below), whose sum is σ = 625527487872. Its totient is φ = 625113773172.

The previous prime is 625320630511. The next prime is 625320630541. The reversal of 625320630521 is 125036023526.

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, and also an emirpimes, since its reverse is a distinct semiprime: 125036023526 = 2 ⋅62518011763.

It is a cyclic number.

It is not a de Polignac number, because 625320630521 - 2¹⁴ = 625320614137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625320630511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103424141 + ... + 103430186.

It is an arithmetic number, because the mean of its divisors is an integer number (156381871968).

Almost surely, 2^625320630521 is an apocalyptic number.

It is an amenable number.

625320630521 is a deficient number, since it is larger than the sum of its proper divisors (206857351).

625320630521 is a wasteful number, since it uses less digits than its factorization.

625320630521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206857350.

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 625320630521 in words is "six hundred twenty-five billion, three hundred twenty million, six hundred thirty thousand, five hundred twenty-one".