211413878639 has 2 divisors, whose sum is σ = 211413878640. Its totient is φ = 211413878638.

The previous prime is 211413878581. The next prime is 211413878707. The reversal of 211413878639 is 936878314112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211413878639 - 2²⁸ = 211145443183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211413878539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105706939319 + 105706939320.

It is an arithmetic number, because the mean of its divisors is an integer number (105706939320).

Almost surely, 2^211413878639 is an apocalyptic number.

211413878639 is a deficient number, since it is larger than the sum of its proper divisors (1).

211413878639 is an equidigital number, since it uses as much as digits as its factorization.

211413878639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 53.

The spelling of 211413878639 in words is "two hundred eleven billion, four hundred thirteen million, eight hundred seventy-eight thousand, six hundred thirty-nine".