31544320634404 has 24 divisors (see below), whose sum is σ = 58462780227768. Its totient is φ = 14841082145280.

The previous prime is 31544320634401. The next prime is 31544320634423. The reversal of 31544320634404 is 40443602344513.

It can be written as a sum of positive squares in 4 ways, for example, as 18119937589504 + 13424383044900 = 4256752^2 + 3663930^2 .

It is not an unprimeable number, because it can be changed into a prime (31544320634401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51317787 + ... + 51928834.

It is an arithmetic number, because the mean of its divisors is an integer number (2435949176157).

Almost surely, 2^{31544320634404} is an apocalyptic number.

31544320634404 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31544320634404 is a deficient number, since it is larger than the sum of its proper divisors (26918459593364).

31544320634404 is a wasteful number, since it uses less digits than its factorization.

31544320634404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103251135 (or 103251133 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 43.

Adding to 31544320634404 its reverse (40443602344513), we get a palindrome (71987922978917).

The spelling of 31544320634404 in words is "thirty-one trillion, five hundred forty-four billion, three hundred twenty million, six hundred thirty-four thousand, four hundred four".