21599776773136 has 45 divisors (see below), whose sum is σ = 42091154630623. Its totient is φ = 10737899284640.

The previous prime is 21599776773103. The next prime is 21599776773163. The reversal of 21599776773136 is 63137767799512.

The square root of 21599776773136 is 4647556.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×21599776773136² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3327646851 + ... + 3327653341.

Almost surely, 2^{21599776773136} is an apocalyptic number.

21599776773136 is the 4647556-th square number.

It is an amenable number.

21599776773136 is a deficient number, since it is larger than the sum of its proper divisors (20491377857487).

21599776773136 is an frugal number, since it uses more digits than its factorization.

21599776773136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13348 (or 6672 counting only the distinct ones).

The product of its digits is 630118440, while the sum is 73.

The spelling of 21599776773136 in words is "twenty-one trillion, five hundred ninety-nine billion, seven hundred seventy-six million, seven hundred seventy-three thousand, one hundred thirty-six".