218605890746 has 16 divisors (see below), whose sum is σ = 332809257600. Its totient is φ = 107675719008.

The previous prime is 218605890719. The next prime is 218605890749. The reversal of 218605890746 is 647098506812.

It is a happy number.

It is a super-4 number, since 4×218605890746⁴ (a number of 46 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 218605890691 and 218605890700.

It is not an unprimeable number, because it can be changed into a prime (218605890749) 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, 1491611 + ... + 1631598.

It is an arithmetic number, because the mean of its divisors is an integer number (20800578600).

Almost surely, 2^218605890746 is an apocalyptic number.

218605890746 is a deficient number, since it is larger than the sum of its proper divisors (114203366854).

218605890746 is a wasteful number, since it uses less digits than its factorization.

218605890746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3123733.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 218605890746 in words is "two hundred eighteen billion, six hundred five million, eight hundred ninety thousand, seven hundred forty-six".