136405385104 has 40 divisors (see below), whose sum is σ = 265384677240. Its totient is φ = 67919244288.

The previous prime is 136405384981. The next prime is 136405385107. The reversal of 136405385104 is 401583504631.

It can be written as a sum of positive squares in 4 ways, for example, as 20750978704 + 115654406400 = 144052^2 + 340080^2 .

It is not an unprimeable number, because it can be changed into a prime (136405385107) 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, 12290982 + ... + 12302074.

It is an arithmetic number, because the mean of its divisors is an integer number (6634616931).

Almost surely, 2^136405385104 is an apocalyptic number.

It is an amenable number.

136405385104 is a deficient number, since it is larger than the sum of its proper divisors (128979292136).

136405385104 is a wasteful number, since it uses less digits than its factorization.

136405385104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14227 (or 14221 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

Adding to 136405385104 its reverse (401583504631), we get a palindrome (537988889735).

The spelling of 136405385104 in words is "one hundred thirty-six billion, four hundred five million, three hundred eighty-five thousand, one hundred four".