6485177640 has 64 divisors (see below), whose sum is σ = 19471881600. Its totient is φ = 1727927552.

The previous prime is 6485177639. The next prime is 6485177651. The reversal of 6485177640 is 467715846.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 6485177640.

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, 124666 + ... + 168854.

It is an arithmetic number, because the mean of its divisors is an integer number (304248150).

Almost surely, 2^6485177640 is an apocalyptic number.

6485177640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6485177640 is an abundant number, since it is smaller than the sum of its proper divisors (12986703960).

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

6485177640 is a wasteful number, since it uses less digits than its factorization.

6485177640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45426 (or 45422 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 48.

The square root of 6485177640 is about 80530.6006434821. The cubic root of 6485177640 is about 1864.8359186436.

The spelling of 6485177640 in words is "six billion, four hundred eighty-five million, one hundred seventy-seven thousand, six hundred forty".