6474625921 has 2 divisors, whose sum is σ = 6474625922. Its totient is φ = 6474625920.

The previous prime is 6474625919. The next prime is 6474625943. The reversal of 6474625921 is 1295264746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6446323521 + 28302400 = 80289^2 + 5320^2 .

It is a cyclic number.

It is not a de Polignac number, because 6474625921 - 2¹ = 6474625919 is a prime.

Together with 6474625919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6474625901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3237312960 + 3237312961.

It is an arithmetic number, because the mean of its divisors is an integer number (3237312961).

Almost surely, 2^6474625921 is an apocalyptic number.

It is an amenable number.

6474625921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6474625921 is an equidigital number, since it uses as much as digits as its factorization.

6474625921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 46.

The square root of 6474625921 is about 80465.0602497755. The cubic root of 6474625921 is about 1863.8239748286.

The spelling of 6474625921 in words is "six billion, four hundred seventy-four million, six hundred twenty-five thousand, nine hundred twenty-one".