16616988890 has 16 divisors (see below), whose sum is σ = 29913219432. Its totient is φ = 6646209024.

The previous prime is 16616988877. The next prime is 16616988953. The reversal of 16616988890 is 9888961661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4715706241 + 11901282649 = 68671^2 + 109093^2 .

It is a super-2 number, since 2×16616988890² (a number of 21 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 56642 + ... + 190898.

Almost surely, 2^16616988890 is an apocalyptic number.

16616988890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16616988890 is a deficient number, since it is larger than the sum of its proper divisors (13296230542).

16616988890 is a wasteful number, since it uses less digits than its factorization.

16616988890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146641.

The product of its (nonzero) digits is 8957952, while the sum is 62.

The spelling of 16616988890 in words is "sixteen billion, six hundred sixteen million, nine hundred eighty-eight thousand, eight hundred ninety".