220615756728 has 16 divisors (see below), whose sum is σ = 551539391880. Its totient is φ = 73538585568.

The previous prime is 220615756687. The next prime is 220615756741. The reversal of 220615756728 is 827657516022.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4596161575 + ... + 4596161622.

Almost surely, 2^220615756728 is an apocalyptic number.

It is an amenable number.

220615756728 is an abundant number, since it is smaller than the sum of its proper divisors (330923635152).

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

220615756728 is a wasteful number, since it uses less digits than its factorization.

220615756728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9192323206 (or 9192323202 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 220615756728 in words is "two hundred twenty billion, six hundred fifteen million, seven hundred fifty-six thousand, seven hundred twenty-eight".