6499051620 has 24 divisors (see below), whose sum is σ = 18197344704. Its totient is φ = 1733080416.

The previous prime is 6499051609. The next prime is 6499051633. The reversal of 6499051620 is 261509946.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54158704 + ... + 54158823.

It is an arithmetic number, because the mean of its divisors is an integer number (758222696).

Almost surely, 2^6499051620 is an apocalyptic number.

6499051620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6499051620 is an abundant number, since it is smaller than the sum of its proper divisors (11698293084).

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

6499051620 is a wasteful number, since it uses less digits than its factorization.

6499051620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108317539 (or 108317537 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 6499051620 is about 80616.6956653521. The cubic root of 6499051620 is about 1866.1648088931.

The spelling of 6499051620 in words is "six billion, four hundred ninety-nine million, fifty-one thousand, six hundred twenty".