6505761890 has 16 divisors (see below), whose sum is σ = 11713972032. Its totient is φ = 2601504624.

The previous prime is 6505761887. The next prime is 6505761931. The reversal of 6505761890 is 981675056.

It is an unprimeable number.

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, 65294 + ... + 131433.

It is an arithmetic number, because the mean of its divisors is an integer number (732123252).

Almost surely, 2^6505761890 is an apocalyptic number.

6505761890 is a deficient number, since it is larger than the sum of its proper divisors (5208210142).

6505761890 is a wasteful number, since it uses less digits than its factorization.

6505761890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200041.

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 6505761890 is about 80658.3032923455. The cubic root of 6505761890 is about 1866.8068596167.

The spelling of 6505761890 in words is "six billion, five hundred five million, seven hundred sixty-one thousand, eight hundred ninety".