136621449448 has 48 divisors (see below), whose sum is σ = 281809614240. Its totient is φ = 62047819680.

The previous prime is 136621449439. The next prime is 136621449479. The reversal of 136621449448 is 844944126631.

It is a junction number, because it is equal to n+sod(n) for n = 136621449395 and 136621449404.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1089565 + ... + 1208467.

It is an arithmetic number, because the mean of its divisors is an integer number (5871033630).

Almost surely, 2^136621449448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136621449448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140904807120).

136621449448 is an abundant number, since it is smaller than the sum of its proper divisors (145188164792).

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

136621449448 is a wasteful number, since it uses less digits than its factorization.

136621449448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120118 (or 120103 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 52.

The spelling of 136621449448 in words is "one hundred thirty-six billion, six hundred twenty-one million, four hundred forty-nine thousand, four hundred forty-eight".