215768904819 has 32 divisors (see below), whose sum is σ = 312908253504. Its totient is φ = 131464581120.

The previous prime is 215768904809. The next prime is 215768904829. The reversal of 215768904819 is 918409867512.

215768904819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (215768904809) and next prime (215768904829).

It is not a de Polignac number, because 215768904819 - 2⁸ = 215768904563 is a prime.

It is a super-2 number, since 2×215768904819² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (215768904809) 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 31 ways as a sum of consecutive naturals, for example, 1559679 + ... + 1692375.

It is an arithmetic number, because the mean of its divisors is an integer number (9778382922).

Almost surely, 2^215768904819 is an apocalyptic number.

215768904819 is a deficient number, since it is larger than the sum of its proper divisors (97139348685).

215768904819 is a wasteful number, since it uses less digits than its factorization.

215768904819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133127.

The product of its (nonzero) digits is 8709120, while the sum is 60.

The spelling of 215768904819 in words is "two hundred fifteen billion, seven hundred sixty-eight million, nine hundred four thousand, eight hundred nineteen".