215779977189 has 16 divisors (see below), whose sum is σ = 365341760640. Its totient is φ = 123302844000.

The previous prime is 215779977167. The next prime is 215779977209. The reversal of 215779977189 is 981779977512.

It is not a de Polignac number, because 215779977189 - 2¹¹ = 215779975141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215779977109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570846312 + ... + 570846689.

It is an arithmetic number, because the mean of its divisors is an integer number (22833860040).

Almost surely, 2^215779977189 is an apocalyptic number.

It is an amenable number.

215779977189 is a deficient number, since it is larger than the sum of its proper divisors (149561783451).

215779977189 is a wasteful number, since it uses less digits than its factorization.

215779977189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141693017 (or 1141693011 counting only the distinct ones).

The product of its digits is 140026320, while the sum is 72.

The spelling of 215779977189 in words is "two hundred fifteen billion, seven hundred seventy-nine million, nine hundred seventy-seven thousand, one hundred eighty-nine".