218886745749 has 8 divisors (see below), whose sum is σ = 333541707840. Its totient is φ = 125078140416.

The previous prime is 218886745729. The next prime is 218886745769. The reversal of 218886745749 is 947547688812.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (218886745729) and next prime (218886745769).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 218886745749 - 2⁵ = 218886745717 is a prime.

It is a super-2 number, since 2×218886745749² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218886745709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5211589164 + ... + 5211589205.

It is an arithmetic number, because the mean of its divisors is an integer number (41692713480).

Almost surely, 2^218886745749 is an apocalyptic number.

It is an amenable number.

218886745749 is a deficient number, since it is larger than the sum of its proper divisors (114654962091).

218886745749 is a wasteful number, since it uses less digits than its factorization.

218886745749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10423178379.

The product of its digits is 216760320, while the sum is 69.

The spelling of 218886745749 in words is "two hundred eighteen billion, eight hundred eighty-six million, seven hundred forty-five thousand, seven hundred forty-nine".