19616663090 has 16 divisors (see below), whose sum is σ = 35489235672. Its totient is φ = 7806833664.

The previous prime is 19616663083. The next prime is 19616663113. The reversal of 19616663090 is 9036661691.

It can be written as a sum of positive squares in 4 ways, for example, as 19240186681 + 376476409 = 138709^2 + 19403^2 .

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, 4976879 + ... + 4980818.

Almost surely, 2^19616663090 is an apocalyptic number.

19616663090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19616663090 is a deficient number, since it is larger than the sum of its proper divisors (15872572582).

19616663090 is a wasteful number, since it uses less digits than its factorization.

19616663090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9957901.

The product of its (nonzero) digits is 314928, while the sum is 47.

The spelling of 19616663090 in words is "nineteen billion, six hundred sixteen million, six hundred sixty-three thousand, ninety".