216625138823 has 2 divisors, whose sum is σ = 216625138824. Its totient is φ = 216625138822.

The previous prime is 216625138819. The next prime is 216625138889. The reversal of 216625138823 is 328831526612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216625138823 - 2² = 216625138819 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216625138423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108312569411 + 108312569412.

It is an arithmetic number, because the mean of its divisors is an integer number (108312569412).

Almost surely, 2^216625138823 is an apocalyptic number.

216625138823 is a deficient number, since it is larger than the sum of its proper divisors (1).

216625138823 is an equidigital number, since it uses as much as digits as its factorization.

216625138823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 47.

The spelling of 216625138823 in words is "two hundred sixteen billion, six hundred twenty-five million, one hundred thirty-eight thousand, eight hundred twenty-three".