1985613326 has 4 divisors (see below), whose sum is σ = 2978419992. Its totient is φ = 992806662.

The previous prime is 1985613323. The next prime is 1985613337. The reversal of 1985613326 is 6233165891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6233165891 = 37 ⋅168463943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985613323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496403330 + ... + 496403333.

It is an arithmetic number, because the mean of its divisors is an integer number (744604998).

Almost surely, 2^1985613326 is an apocalyptic number.

1985613326 is a deficient number, since it is larger than the sum of its proper divisors (992806666).

1985613326 is an equidigital number, since it uses as much as digits as its factorization.

1985613326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992806665.

The product of its digits is 233280, while the sum is 44.

The square root of 1985613326 is about 44560.2213414610. The cubic root of 1985613326 is about 1256.8927648525.

The spelling of 1985613326 in words is "one billion, nine hundred eighty-five million, six hundred thirteen thousand, three hundred twenty-six".