220878613538 has 16 divisors (see below), whose sum is σ = 361453139424. Its totient is φ = 100395089760.

The previous prime is 220878613513. The next prime is 220878613601. The reversal of 220878613538 is 835316878022.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 220878613538.

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, 346406 + ... + 749502.

It is an arithmetic number, because the mean of its divisors is an integer number (22590821214).

Almost surely, 2^220878613538 is an apocalyptic number.

220878613538 is a deficient number, since it is larger than the sum of its proper divisors (140574525886).

220878613538 is a wasteful number, since it uses less digits than its factorization.

220878613538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428017.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 220878613538 in words is "two hundred twenty billion, eight hundred seventy-eight million, six hundred thirteen thousand, five hundred thirty-eight".