135123550000 has 60 divisors (see below), whose sum is σ = 327231524592. Its totient is φ = 54049400000.

The previous prime is 135123549947. The next prime is 135123550013. The reversal of 135123550000 is 55321531.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1301236 + ... + 1401235.

Almost surely, 2^135123550000 is an apocalyptic number.

135123550000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135123550000 is an abundant number, since it is smaller than the sum of its proper divisors (192107974592).

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

135123550000 is an frugal number, since it uses more digits than its factorization.

135123550000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702504 (or 2702478 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

Adding to 135123550000 its reverse (55321531), we get a palindrome (135178871531).

The spelling of 135123550000 in words is "one hundred thirty-five billion, one hundred twenty-three million, five hundred fifty thousand".