220778007636 has 48 divisors (see below), whose sum is σ = 518562168320. Its totient is φ = 73105269120.

The previous prime is 220778007577. The next prime is 220778007647. The reversal of 220778007636 is 636700877022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8727246 + ... + 8752506.

Almost surely, 2^220778007636 is an apocalyptic number.

It is an amenable number.

220778007636 is an abundant number, since it is smaller than the sum of its proper divisors (297784160684).

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

220778007636 is a wasteful number, since it uses less digits than its factorization.

220778007636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30064 (or 30062 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 48.

The spelling of 220778007636 in words is "two hundred twenty billion, seven hundred seventy-eight million, seven thousand, six hundred thirty-six".