22078816551 has 24 divisors (see below), whose sum is σ = 34955781120. Its totient is φ = 13317670800.

The previous prime is 22078816549. The next prime is 22078816579. The reversal of 22078816551 is 15561887022.

22078816551 is a `hidden beast` number, since 2 + 2 + 0 + 7 + 88 + 16 + 551 = 666.

It is not a de Polignac number, because 22078816551 - 2¹ = 22078816549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22078816497 and 22078816506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22078816451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 507591 + ... + 549368.

It is an arithmetic number, because the mean of its divisors is an integer number (1456490880).

Almost surely, 2^22078816551 is an apocalyptic number.

22078816551 is a deficient number, since it is larger than the sum of its proper divisors (12876964569).

22078816551 is a wasteful number, since it uses less digits than its factorization.

22078816551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057187 (or 1057184 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The spelling of 22078816551 in words is "twenty-two billion, seventy-eight million, eight hundred sixteen thousand, five hundred fifty-one".