6465920140 has 24 divisors (see below), whose sum is σ = 13622105952. Its totient is φ = 2578049280.

The previous prime is 6465920099. The next prime is 6465920141. The reversal of 6465920140 is 410295646.

It is a self number, because there is not a number n which added to its sum of digits gives 6465920140.

It is not an unprimeable number, because it can be changed into a prime (6465920141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513549 + ... + 525988.

It is an arithmetic number, because the mean of its divisors is an integer number (567587748).

Almost surely, 2^6465920140 is an apocalyptic number.

It is an amenable number.

6465920140 is an abundant number, since it is smaller than the sum of its proper divisors (7156185812).

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

6465920140 is a wasteful number, since it uses less digits than its factorization.

6465920140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039857 (or 1039855 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 6465920140 is about 80410.9453992428. The cubic root of 6465920140 is about 1862.9882343295.

The spelling of 6465920140 in words is "six billion, four hundred sixty-five million, nine hundred twenty thousand, one hundred forty".