136128878450 has 12 divisors (see below), whose sum is σ = 253199714010. Its totient is φ = 54451551360.

The previous prime is 136128878429. The next prime is 136128878477. The reversal of 136128878450 is 54878821631.

It can be written as a sum of positive squares in 3 ways, for example, as 53253408289 + 82875470161 = 230767^2 + 287881^2 .

It is a junction number, because it is equal to n+sod(n) for n = 136128878392 and 136128878401.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1361288735 + ... + 1361288834.

Almost surely, 2^136128878450 is an apocalyptic number.

136128878450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136128878450 is a deficient number, since it is larger than the sum of its proper divisors (117070835560).

136128878450 is a wasteful number, since it uses less digits than its factorization.

136128878450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722577581 (or 2722577576 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 53.

The spelling of 136128878450 in words is "one hundred thirty-six billion, one hundred twenty-eight million, eight hundred seventy-eight thousand, four hundred fifty".