135661510250000 has 420 divisors, whose sum is σ = 394521875055360. Its totient is φ = 45011988000000.

The previous prime is 135661510249921. The next prime is 135661510250051. The reversal of 135661510250000 is 52015166531.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 379571381 + ... + 379928619.

Almost surely, 2^{135661510250000} is an apocalyptic number.

135661510250000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135661510250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197260937527680).

135661510250000 is an abundant number, since it is smaller than the sum of its proper divisors (258860364805360).

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

135661510250000 is an frugal number, since it uses more digits than its factorization.

135661510250000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357322 (or 357284 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 135661510250000 in words is "one hundred thirty-five trillion, six hundred sixty-one billion, five hundred ten million, two hundred fifty thousand".