625021311851 has 2 divisors, whose sum is σ = 625021311852. Its totient is φ = 625021311850.

The previous prime is 625021311821. The next prime is 625021311853. The reversal of 625021311851 is 158113120526.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625021311851 is a prime.

Together with 625021311853, 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 (625021311853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312510655925 + 312510655926.

It is an arithmetic number, because the mean of its divisors is an integer number (312510655926).

Almost surely, 2^625021311851 is an apocalyptic number.

625021311851 is a deficient number, since it is larger than the sum of its proper divisors (1).

625021311851 is an equidigital number, since it uses as much as digits as its factorization.

625021311851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 35.

The spelling of 625021311851 in words is "six hundred twenty-five billion, twenty-one million, three hundred eleven thousand, eight hundred fifty-one".