6638322090 has 32 divisors (see below), whose sum is σ = 15965268480. Its totient is φ = 1766519744.

The previous prime is 6638322073. The next prime is 6638322139. The reversal of 6638322090 is 902238366.

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, 216609 + ... + 245348.

It is an arithmetic number, because the mean of its divisors is an integer number (498914640).

Almost surely, 2^6638322090 is an apocalyptic number.

6638322090 is an abundant number, since it is smaller than the sum of its proper divisors (9326946390).

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

6638322090 is a wasteful number, since it uses less digits than its factorization.

6638322090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462446.

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 6638322090 is about 81475.8988290402. The cubic root of 6638322090 is about 1879.4009418085.

The spelling of 6638322090 in words is "six billion, six hundred thirty-eight million, three hundred twenty-two thousand, ninety".