1906622081 has 16 divisors (see below), whose sum is σ = 2427532800. Its totient is φ = 1456515648.

The previous prime is 1906622071. The next prime is 1906622087. The reversal of 1906622081 is 1802266091.

It is a de Polignac number, because none of the positive numbers 2^k-1906622081 is a prime.

It is a super-2 number, since 2×1906622081² = 7270415519513541122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1906622087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358601 + ... + 363878.

It is an arithmetic number, because the mean of its divisors is an integer number (151720800).

Almost surely, 2^1906622081 is an apocalyptic number.

It is an amenable number.

1906622081 is a deficient number, since it is larger than the sum of its proper divisors (520910719).

1906622081 is a wasteful number, since it uses less digits than its factorization.

1906622081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722528.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1906622081 is about 43664.8838427403. The cubic root of 1906622081 is about 1239.9995839836. Note that the first 3 decimals are identical.

The spelling of 1906622081 in words is "one billion, nine hundred six million, six hundred twenty-two thousand, eighty-one".