1768221512 has 12 divisors (see below), whose sum is σ = 3315638355. Its totient is φ = 884051288.

The previous prime is 1768221487. The next prime is 1768221523. The reversal of 1768221512 is 2151228671.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 884110756 + 884110756 = 29734^2 + 29734^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=29734.

It is a super-2 number, since 2×1768221512² = 6253214630999132288, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 111503 + ... + 126369.

Almost surely, 2^1768221512 is an apocalyptic number.

It is an amenable number.

1768221512 is a deficient number, since it is larger than the sum of its proper divisors (1547416843).

1768221512 is an frugal number, since it uses more digits than its factorization.

1768221512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29740 (or 14869 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 1768221512 is about 42050.2260636016. The cubic root of 1768221512 is about 1209.2392166810.

The spelling of 1768221512 in words is "one billion, seven hundred sixty-eight million, two hundred twenty-one thousand, five hundred twelve".