63773421156 has 27 divisors (see below), whose sum is σ = 161208867001. Its totient is φ = 21257301984.

The previous prime is 63773421139. The next prime is 63773421193. The reversal of 63773421156 is 65112437736.

The square root of 63773421156 is 252534.

It is a perfect power (a square), and thus also a powerful number.

63773421156 is a `hidden beast` number, since 6 + 3 + 7 + 73 + 421 + 156 = 666.

63773421156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 63386118756 + 387302400 = 251766^2 + 19680^2 .

It is a super-4 number, since 4×63773421156⁴ (a number of 44 digits) contains 4444 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1494160 + ... + 1536248.

Almost surely, 2^63773421156 is an apocalyptic number.

63773421156 is the 252534-th square number.

It is an amenable number.

63773421156 is an abundant number, since it is smaller than the sum of its proper divisors (97435445845).

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

63773421156 is an frugal number, since it uses more digits than its factorization.

63773421156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84188 (or 42094 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The spelling of 63773421156 in words is "sixty-three billion, seven hundred seventy-three million, four hundred twenty-one thousand, one hundred fifty-six".