1621069012 has 12 divisors (see below), whose sum is σ = 2913543220. Its totient is φ = 788628096.

The previous prime is 1621069007. The next prime is 1621069061. The reversal of 1621069012 is 2109601261.

It can be written as a sum of positive squares in 2 ways, for example, as 890664336 + 730404676 = 29844^2 + 27026^2 .

It is a super-2 number, since 2×1621069012² = 5255729483333312288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5476437 + ... + 5476732.

Almost surely, 2^1621069012 is an apocalyptic number.

It is an amenable number.

1621069012 is a deficient number, since it is larger than the sum of its proper divisors (1292474208).

1621069012 is a wasteful number, since it uses less digits than its factorization.

1621069012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10953210 (or 10953208 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1621069012 is about 40262.5013132567. The cubic root of 1621069012 is about 1174.7185713801.

The spelling of 1621069012 in words is "one billion, six hundred twenty-one million, sixty-nine thousand, twelve".