63578778211 has 4 divisors (see below), whose sum is σ = 68469453472. Its totient is φ = 58688102952.

The previous prime is 63578778203. The next prime is 63578778229. The reversal of 63578778211 is 11287787536.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63578778211 - 2³ = 63578778203 is a prime.

It is a super-2 number, since 2×63578778211² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63578778271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2445337611 + ... + 2445337636.

It is an arithmetic number, because the mean of its divisors is an integer number (17117363368).

Almost surely, 2^63578778211 is an apocalyptic number.

63578778211 is a deficient number, since it is larger than the sum of its proper divisors (4890675261).

63578778211 is a wasteful number, since it uses less digits than its factorization.

63578778211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4890675260.

The product of its digits is 3951360, while the sum is 55.

The spelling of 63578778211 in words is "sixty-three billion, five hundred seventy-eight million, seven hundred seventy-eight thousand, two hundred eleven".