216379426389 has 24 divisors (see below), whose sum is σ = 335774937888. Its totient is φ = 123584217120.

The previous prime is 216379426357. The next prime is 216379426421. The reversal of 216379426389 is 983624973612.

It is an interprime number because it is at equal distance from previous prime (216379426357) and next prime (216379426421).

It is not a de Polignac number, because 216379426389 - 2⁵ = 216379426357 is a prime.

It is a super-4 number, since 4×216379426389⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216379426789) 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, 65122 + ... + 661059.

It is an arithmetic number, because the mean of its divisors is an integer number (13990622412).

Almost surely, 2^216379426389 is an apocalyptic number.

It is an amenable number.

216379426389 is a deficient number, since it is larger than the sum of its proper divisors (119395511499).

216379426389 is a wasteful number, since it uses less digits than its factorization.

216379426389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728225 (or 728218 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 60.

The spelling of 216379426389 in words is "two hundred sixteen billion, three hundred seventy-nine million, four hundred twenty-six thousand, three hundred eighty-nine".