6469631920 has 20 divisors (see below), whose sum is σ = 15041894400. Its totient is φ = 2587852736.

The previous prime is 6469631891. The next prime is 6469631923. The reversal of 6469631920 is 291369646.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×6469631920² = 83712274360565772800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6469631923) 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, 40435120 + ... + 40435279.

It is an arithmetic number, because the mean of its divisors is an integer number (752094720).

Almost surely, 2^6469631920 is an apocalyptic number.

It is an amenable number.

6469631920 is an abundant number, since it is smaller than the sum of its proper divisors (8572262480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6469631920 is a wasteful number, since it uses less digits than its factorization.

6469631920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80870412 (or 80870406 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 6469631920 is about 80434.0221548071. The cubic root of 6469631920 is about 1863.3446507171.

The spelling of 6469631920 in words is "six billion, four hundred sixty-nine million, six hundred thirty-one thousand, nine hundred twenty".