211916707458 has 16 divisors (see below), whose sum is σ = 448764792480. Its totient is φ = 66483672896.

The previous prime is 211916707439. The next prime is 211916707477. The reversal of 211916707458 is 854707619112.

It is an interprime number because it is at equal distance from previous prime (211916707439) and next prime (211916707477).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 211916707458.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038807288 + ... + 1038807491.

It is an arithmetic number, because the mean of its divisors is an integer number (28047799530).

Almost surely, 2^211916707458 is an apocalyptic number.

211916707458 is an abundant number, since it is smaller than the sum of its proper divisors (236848085022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211916707458 is a wasteful number, since it uses less digits than its factorization.

211916707458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077614801.

The product of its (nonzero) digits is 846720, while the sum is 51.

The spelling of 211916707458 in words is "two hundred eleven billion, nine hundred sixteen million, seven hundred seven thousand, four hundred fifty-eight".