625306201601 has 2 divisors, whose sum is σ = 625306201602. Its totient is φ = 625306201600.

The previous prime is 625306201591. The next prime is 625306201603. The reversal of 625306201601 is 106102603526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 434993011600 + 190313190001 = 659540^2 + 436249^2 .

It is a cyclic number.

It is not a de Polignac number, because 625306201601 - 2⁶ = 625306201537 is a prime.

Together with 625306201603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (625306201603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312653100800 + 312653100801.

It is an arithmetic number, because the mean of its divisors is an integer number (312653100801).

Almost surely, 2^625306201601 is an apocalyptic number.

It is an amenable number.

625306201601 is a deficient number, since it is larger than the sum of its proper divisors (1).

625306201601 is an equidigital number, since it uses as much as digits as its factorization.

625306201601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 625306201601 in words is "six hundred twenty-five billion, three hundred six million, two hundred one thousand, six hundred one".