10217780578 has 4 divisors (see below), whose sum is σ = 15326670870. Its totient is φ = 5108890288.

The previous prime is 10217780561. The next prime is 10217780591. The reversal of 10217780578 is 87508771201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87508771201 = 163 ⋅536863627.

It can be written as a sum of positive squares in only one way, i.e., 7848719649 + 2369060929 = 88593^2 + 48673^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2554445143 + ... + 2554445146.

Almost surely, 2^10217780578 is an apocalyptic number.

10217780578 is a deficient number, since it is larger than the sum of its proper divisors (5108890292).

10217780578 is an equidigital number, since it uses as much as digits as its factorization.

10217780578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5108890291.

The product of its (nonzero) digits is 219520, while the sum is 46.

The spelling of 10217780578 in words is "ten billion, two hundred seventeen million, seven hundred eighty thousand, five hundred seventy-eight".