21599835998622 has 16 divisors (see below), whose sum is σ = 49371053711232. Its totient is φ = 6171381713880.

The previous prime is 21599835998617. The next prime is 21599835998639. The reversal of 21599835998622 is 22689953899512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257140904704 + ... + 257140904787.

It is an arithmetic number, because the mean of its divisors is an integer number (3085690856952).

Almost surely, 2^{21599835998622} is an apocalyptic number.

21599835998622 is an abundant number, since it is smaller than the sum of its proper divisors (27771217712610).

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

21599835998622 is a wasteful number, since it uses less digits than its factorization.

21599835998622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514281809503.

The product of its digits is 1511654400, while the sum is 78.

The spelling of 21599835998622 in words is "twenty-one trillion, five hundred ninety-nine billion, eight hundred thirty-five million, nine hundred ninety-eight thousand, six hundred twenty-two".