1013645985 has 16 divisors (see below), whose sum is σ = 1769273280. Its totient is φ = 491464640.

The previous prime is 1013645959. The next prime is 1013645987. The reversal of 1013645985 is 5895463101.

It is not a de Polignac number, because 1013645985 - 2²¹ = 1011548833 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1013645987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3071490 + ... + 3071819.

It is an arithmetic number, because the mean of its divisors is an integer number (110579580).

Almost surely, 2^1013645985 is an apocalyptic number.

1013645985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1013645985 is a deficient number, since it is larger than the sum of its proper divisors (755627295).

1013645985 is a wasteful number, since it uses less digits than its factorization.

1013645985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6143328.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 1013645985 is about 31837.8074779027. The cubic root of 1013645985 is about 1004.5281267863.

The spelling of 1013645985 in words is "one billion, thirteen million, six hundred forty-five thousand, nine hundred eighty-five".