135861798220 has 24 divisors (see below), whose sum is σ = 285325264224. Its totient is φ = 54341769216.

The previous prime is 135861798209. The next prime is 135861798223. The reversal of 135861798220 is 22897168531.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (135861798223) 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, 214284 + ... + 563596.

It is an arithmetic number, because the mean of its divisors is an integer number (11888552676).

Almost surely, 2^135861798220 is an apocalyptic number.

135861798220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135861798220 is an abundant number, since it is smaller than the sum of its proper divisors (149463466004).

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

135861798220 is a wasteful number, since it uses less digits than its factorization.

135861798220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368769 (or 368767 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 135861798220 in words is "one hundred thirty-five billion, eight hundred sixty-one million, seven hundred ninety-eight thousand, two hundred twenty".