16906640270890 has 32 divisors (see below), whose sum is σ = 30855276530640. Its totient is φ = 6668622825984.

The previous prime is 16906640270851. The next prime is 16906640270951. The reversal of 16906640270890 is 9807204660961.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2226454921161 + 14680185349729 = 1492131^2 + 3831473^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1077952 + ... + 5913988.

Almost surely, 2^{16906640270890} is an apocalyptic number.

16906640270890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16906640270890 is a deficient number, since it is larger than the sum of its proper divisors (13948636259750).

16906640270890 is a wasteful number, since it uses less digits than its factorization.

16906640270890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4840906.

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 16906640270890 in words is "sixteen trillion, nine hundred six billion, six hundred forty million, two hundred seventy thousand, eight hundred ninety".