63572216197778 has 6 divisors (see below), whose sum is σ = 95358341210421. Its totient is φ = 31786102460972.

The previous prime is 63572216197753. The next prime is 63572216197793. The reversal of 63572216197778 is 87779161227536.

It can be written as a sum of positive squares in 2 ways, for example, as 52855909822849 + 10716306374929 = 7270207^2 + 3273577^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5637917.

It is a super-2 number, since 2×63572216197778² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 8456876 + ... + 14094792.

Almost surely, 2^{63572216197778} is an apocalyptic number.

63572216197778 is a deficient number, since it is larger than the sum of its proper divisors (31786125012643).

63572216197778 is an frugal number, since it uses more digits than its factorization.

63572216197778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11275836 (or 5637919 counting only the distinct ones).

The product of its digits is 373403520, while the sum is 71.

The spelling of 63572216197778 in words is "sixty-three trillion, five hundred seventy-two billion, two hundred sixteen million, one hundred ninety-seven thousand, seven hundred seventy-eight".