1999068522 has 64 divisors (see below), whose sum is σ = 4705444224. Its totient is φ = 559370240.

The previous prime is 1999068521. The next prime is 1999068541. The reversal of 1999068522 is 2258609991.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (1999068521) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 42658 + ... + 76274.

It is an arithmetic number, because the mean of its divisors is an integer number (73522566).

Almost surely, 2^1999068522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1999068522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2352722112).

1999068522 is an abundant number, since it is smaller than the sum of its proper divisors (2706375702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1999068522 is a wasteful number, since it uses less digits than its factorization.

1999068522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33703.

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 1999068522 is about 44710.9440964961. The cubic root of 1999068522 is about 1259.7254213978.

The spelling of 1999068522 in words is "one billion, nine hundred ninety-nine million, sixty-eight thousand, five hundred twenty-two".