136628400820 has 24 divisors (see below), whose sum is σ = 293917683528. Its totient is φ = 53318400000.

The previous prime is 136628400809. The next prime is 136628400829. The reversal of 136628400820 is 28004826631.

It can be written as a sum of positive squares in 4 ways, for example, as 163175076 + 136465225744 = 12774^2 + 369412^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136628400829) 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, 83309181 + ... + 83310820.

It is an arithmetic number, because the mean of its divisors is an integer number (12246570147).

Almost surely, 2^136628400820 is an apocalyptic number.

136628400820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136628400820 is an abundant number, since it is smaller than the sum of its proper divisors (157289282708).

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

136628400820 is a wasteful number, since it uses less digits than its factorization.

136628400820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166620051 (or 166620049 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 136628400820 in words is "one hundred thirty-six billion, six hundred twenty-eight million, four hundred thousand, eight hundred twenty".