22378816287 has 6 divisors (see below), whose sum is σ = 32324956872. Its totient is φ = 14919210852.

The previous prime is 22378816279. The next prime is 22378816307. The reversal of 22378816287 is 78261887322.

22378816287 is a `hidden beast` number, since 2 + 2 + 3 + 7 + 8 + 8 + 1 + 628 + 7 = 666.

It is not a de Polignac number, because 22378816287 - 2³ = 22378816279 is a prime.

It is a super-3 number, since 3×22378816287³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22378816217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1243267563 + ... + 1243267580.

It is an arithmetic number, because the mean of its divisors is an integer number (5387492812).

Almost surely, 2^22378816287 is an apocalyptic number.

22378816287 is a deficient number, since it is larger than the sum of its proper divisors (9946140585).

22378816287 is a wasteful number, since it uses less digits than its factorization.

22378816287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486535149 (or 2486535146 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The spelling of 22378816287 in words is "twenty-two billion, three hundred seventy-eight million, eight hundred sixteen thousand, two hundred eighty-seven".