135555620 has 24 divisors (see below), whose sum is σ = 301412664. Its totient is φ = 51032576.

The previous prime is 135555611. The next prime is 135555631. The reversal of 135555620 is 26555531.

It can be written as a sum of positive squares in 4 ways, for example, as 5914624 + 129640996 = 2432^2 + 11386^2 .

It is a super-2 number, since 2×135555620² = 36750652227168800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199007 + ... + 199686.

It is an arithmetic number, because the mean of its divisors is an integer number (12558861).

Almost surely, 2^135555620 is an apocalyptic number.

135555620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135555620 is an abundant number, since it is smaller than the sum of its proper divisors (165857044).

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

135555620 is a wasteful number, since it uses less digits than its factorization.

135555620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398719 (or 398717 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 135555620 is about 11642.8355652736. The cubic root of 135555620 is about 513.6955961279.

The spelling of 135555620 in words is "one hundred thirty-five million, five hundred fifty-five thousand, six hundred twenty".