6649438190 has 16 divisors (see below), whose sum is σ = 11997426240. Its totient is φ = 2653455840.

The previous prime is 6649438183. The next prime is 6649438241. The reversal of 6649438190 is 918349466.

It is a super-2 number, since 2×6649438190² = 88430056485260952200, which contains 22 as substring.

It is a congruent 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, 785510 + ... + 793929.

It is an arithmetic number, because the mean of its divisors is an integer number (749839140).

Almost surely, 2^6649438190 is an apocalyptic number.

6649438190 is a deficient number, since it is larger than the sum of its proper divisors (5347988050).

6649438190 is a wasteful number, since it uses less digits than its factorization.

6649438190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579867.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The square root of 6649438190 is about 81544.0874006203. The cubic root of 6649438190 is about 1880.4493974334.

The spelling of 6649438190 in words is "six billion, six hundred forty-nine million, four hundred thirty-eight thousand, one hundred ninety".