136320221040 has 80 divisors (see below), whose sum is σ = 432899855136. Its totient is φ = 35465420800.

The previous prime is 136320220997. The next prime is 136320221047. The reversal of 136320221040 is 40122023631.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 136320221040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136320221047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6917001 + ... + 6936680.

Almost surely, 2^136320221040 is an apocalyptic number.

136320221040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136320221040 is an abundant number, since it is smaller than the sum of its proper divisors (296579634096).

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

136320221040 is a wasteful number, since it uses less digits than its factorization.

136320221040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13853738 (or 13853732 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 136320221040 its reverse (40122023631), we get a palindrome (176442244671).

The spelling of 136320221040 in words is "one hundred thirty-six billion, three hundred twenty million, two hundred twenty-one thousand, forty".