36556221434 has 4 divisors (see below), whose sum is σ = 54834332154. Its totient is φ = 18278110716.

The previous prime is 36556221433. The next prime is 36556221451. The reversal of 36556221434 is 43412265563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43412265563 = 149 ⋅291357487.

It can be written as a sum of positive squares in only one way, i.e., 20668375225 + 15887846209 = 143765^2 + 126047^2 .

It is a junction number, because it is equal to n+sod(n) for n = 36556221391 and 36556221400.

It is not an unprimeable number, because it can be changed into a prime (36556221433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9139055357 + ... + 9139055360.

Almost surely, 2^36556221434 is an apocalyptic number.

36556221434 is a deficient number, since it is larger than the sum of its proper divisors (18278110720).

36556221434 is a wasteful number, since it uses less digits than its factorization.

36556221434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18278110719.

The product of its digits is 518400, while the sum is 41.

Adding to 36556221434 its reverse (43412265563), we get a palindrome (79968486997).

The spelling of 36556221434 in words is "thirty-six billion, five hundred fifty-six million, two hundred twenty-one thousand, four hundred thirty-four".