6425051993 has 4 divisors (see below), whose sum is σ = 6646605540. Its totient is φ = 6203498448.

The previous prime is 6425051977. The next prime is 6425051999. The reversal of 6425051993 is 3991505246.

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 3623678809 + 2801373184 = 60197^2 + 52928^2 .

It is a cyclic number.

It is not a de Polignac number, because 6425051993 - 2⁴ = 6425051977 is a prime.

It is a super-2 number, since 2×6425051993² = 82562586225506544098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6425051999) 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, 110776730 + ... + 110776787.

It is an arithmetic number, because the mean of its divisors is an integer number (1661651385).

Almost surely, 2^6425051993 is an apocalyptic number.

It is an amenable number.

6425051993 is a deficient number, since it is larger than the sum of its proper divisors (221553547).

6425051993 is a wasteful number, since it uses less digits than its factorization.

6425051993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221553546.

The product of its (nonzero) digits is 291600, while the sum is 44.

The square root of 6425051993 is about 80156.4220321741. The cubic root of 6425051993 is about 1859.0549013107.

The spelling of 6425051993 in words is "six billion, four hundred twenty-five million, fifty-one thousand, nine hundred ninety-three".