1650120012 has 120 divisors (see below), whose sum is σ = 4470371136. Its totient is φ = 530403552.

The previous prime is 1650120001. The next prime is 1650120023. The reversal of 1650120012 is 2100210561.

1650120012 is a `hidden beast` number, since 1 + 650 + 1 + 2 + 0 + 0 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (1650120001) and next prime (1650120023).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1155643 + ... + 1157069.

Almost surely, 2^1650120012 is an apocalyptic number.

1650120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1650120012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2235185568).

1650120012 is an abundant number, since it is smaller than the sum of its proper divisors (2820251124).

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

1650120012 is a wasteful number, since it uses less digits than its factorization.

1650120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569 (or 1558 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1650120012 is about 40621.6692419206. The cubic root of 1650120012 is about 1181.6943990800.

Adding to 1650120012 its reverse (2100210561), we get a palindrome (3750330573).

The spelling of 1650120012 in words is "one billion, six hundred fifty million, one hundred twenty thousand, twelve".