1690444801 has 16 divisors (see below), whose sum is σ = 1834136640. Its totient is φ = 1552711680.

The previous prime is 1690444799. The next prime is 1690444831. The reversal of 1690444801 is 1084440961.

It is a cyclic number.

It is not a de Polignac number, because 1690444801 - 2¹ = 1690444799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1690444831) 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, 120321 + ... + 133633.

It is an arithmetic number, because the mean of its divisors is an integer number (114633540).

Almost surely, 2^1690444801 is an apocalyptic number.

It is an amenable number.

1690444801 is a deficient number, since it is larger than the sum of its proper divisors (143691839).

1690444801 is a wasteful number, since it uses less digits than its factorization.

1690444801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13536.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 1690444801 is about 41115.0191657501. The cubic root of 1690444801 is about 1191.2429169296.

The spelling of 1690444801 in words is "one billion, six hundred ninety million, four hundred forty-four thousand, eight hundred one".