135555780 has 48 divisors (see below), whose sum is σ = 388390464. Its totient is φ = 35306880.

The previous prime is 135555757. The next prime is 135555803. The reversal of 135555780 is 87555531.

It is an interprime number because it is at equal distance from previous prime (135555757) and next prime (135555803).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23691 + ... + 28850.

It is an arithmetic number, because the mean of its divisors is an integer number (8091468).

Almost surely, 2^135555780 is an apocalyptic number.

135555780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135555780 is an abundant number, since it is smaller than the sum of its proper divisors (252834684).

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

135555780 is a wasteful number, since it uses less digits than its factorization.

135555780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52596 (or 52594 counting only the distinct ones).

The product of its (nonzero) digits is 105000, while the sum is 39.

The square root of 135555780 is about 11642.8424364500. The cubic root of 135555780 is about 513.6957982375.

The spelling of 135555780 in words is "one hundred thirty-five million, five hundred fifty-five thousand, seven hundred eighty".