6445988051 has 8 divisors (see below), whose sum is σ = 6785987520. Its totient is φ = 6106062312.

The previous prime is 6445988047. The next prime is 6445988117. The reversal of 6445988051 is 1508895446.

6445988051 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6445988051 - 2² = 6445988047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6445988011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333416 + ... + 352218.

It is an arithmetic number, because the mean of its divisors is an integer number (848248440).

Almost surely, 2^6445988051 is an apocalyptic number.

6445988051 is a deficient number, since it is larger than the sum of its proper divisors (339999469).

6445988051 is a wasteful number, since it uses less digits than its factorization.

6445988051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36865.

The product of its (nonzero) digits is 1382400, while the sum is 50.

The square root of 6445988051 is about 80286.9108323393. The cubic root of 6445988051 is about 1861.0719580129.

The spelling of 6445988051 in words is "six billion, four hundred forty-five million, nine hundred eighty-eight thousand, fifty-one".