136138587820 has 12 divisors (see below), whose sum is σ = 285891034464. Its totient is φ = 54455435120.

The previous prime is 136138587817. The next prime is 136138587821. The reversal of 136138587820 is 28785831631.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (136138587821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3403464676 + ... + 3403464715.

It is an arithmetic number, because the mean of its divisors is an integer number (23824252872).

Almost surely, 2^136138587820 is an apocalyptic number.

136138587820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136138587820 is an abundant number, since it is smaller than the sum of its proper divisors (149752446644).

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

136138587820 is a wasteful number, since it uses less digits than its factorization.

136138587820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6806929400 (or 6806929398 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 136138587820 in words is "one hundred thirty-six billion, one hundred thirty-eight million, five hundred eighty-seven thousand, eight hundred twenty".