21577677512 has 16 divisors (see below), whose sum is σ = 40562156700. Its totient is φ = 10761102400.

The previous prime is 21577677491. The next prime is 21577677547.

21577677512 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 21337613476 + 240064036 = 146074^2 + 15494^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3463739 + ... + 3469962.

Almost surely, 2^21577677512 is an apocalyptic number.

It is an amenable number.

21577677512 is a deficient number, since it is larger than the sum of its proper divisors (18984479188).

21577677512 is a wasteful number, since it uses less digits than its factorization.

21577677512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6934096 (or 6934092 counting only the distinct ones).

The product of its digits is 1440600, while the sum is 50.

The spelling of 21577677512 in words is "twenty-one billion, five hundred seventy-seven million, six hundred seventy-seven thousand, five hundred twelve".