6499969140 has 48 divisors (see below), whose sum is σ = 20799902592. Its totient is φ = 1485707136.

The previous prime is 6499969111. The next prime is 6499969181. The reversal of 6499969140 is 419699946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7737639 + ... + 7738478.

It is an arithmetic number, because the mean of its divisors is an integer number (433331304).

Almost surely, 2^6499969140 is an apocalyptic number.

6499969140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6499969140 is an abundant number, since it is smaller than the sum of its proper divisors (14299933452).

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

6499969140 is a wasteful number, since it uses less digits than its factorization.

6499969140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15476136 (or 15476134 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 57.

The square root of 6499969140 is about 80622.3860971629. The cubic root of 6499969140 is about 1866.2526249349.

The spelling of 6499969140 in words is "six billion, four hundred ninety-nine million, nine hundred sixty-nine thousand, one hundred forty".