6499051680 has 96 divisors (see below), whose sum is σ = 22333123008. Its totient is φ = 1575526400.

The previous prime is 6499051679. The next prime is 6499051681. The reversal of 6499051680 is 861509946.

It is an interprime number because it is at equal distance from previous prime (6499051679) and next prime (6499051681).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (6499051681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 610161 + ... + 620720.

It is an arithmetic number, because the mean of its divisors is an integer number (232636698).

Almost surely, 2^6499051680 is an apocalyptic number.

6499051680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6499051680 is an abundant number, since it is smaller than the sum of its proper divisors (15834071328).

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

6499051680 is a wasteful number, since it uses less digits than its factorization.

6499051680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230910 (or 1230902 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 6499051680 is about 80616.6960374835. The cubic root of 6499051680 is about 1866.1648146360.

The spelling of 6499051680 in words is "six billion, four hundred ninety-nine million, fifty-one thousand, six hundred eighty".