216575025667 has 64 divisors (see below), whose sum is σ = 302322585600. Its totient is φ = 152837193600.

The previous prime is 216575025637. The next prime is 216575025671. The reversal of 216575025667 is 766520575612.

It is not a de Polignac number, because 216575025667 - 2⁷ = 216575025539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216575025607) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2557942 + ... + 2641252.

It is an arithmetic number, because the mean of its divisors is an integer number (4723790400).

Almost surely, 2^216575025667 is an apocalyptic number.

216575025667 is a deficient number, since it is larger than the sum of its proper divisors (85747559933).

216575025667 is a wasteful number, since it uses less digits than its factorization.

216575025667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83409 (or 83395 counting only the distinct ones).

The product of its (nonzero) digits is 5292000, while the sum is 52.

Subtracting 216575025667 from its reverse (766520575612), we obtain a palindrome (549945549945).

The spelling of 216575025667 in words is "two hundred sixteen billion, five hundred seventy-five million, twenty-five thousand, six hundred sixty-seven".