135821745950 has 24 divisors (see below), whose sum is σ = 275594671080. Its totient is φ = 49389725600.

The previous prime is 135821745947. The next prime is 135821745959. The reversal of 135821745950 is 59547128531.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135821745959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123473765 + ... + 123474864.

It is an arithmetic number, because the mean of its divisors is an integer number (11483111295).

Almost surely, 2^135821745950 is an apocalyptic number.

135821745950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135821745950 is an abundant number, since it is smaller than the sum of its proper divisors (139772925130).

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

135821745950 is a wasteful number, since it uses less digits than its factorization.

135821745950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246948652 (or 246948647 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 135821745950 in words is "one hundred thirty-five billion, eight hundred twenty-one million, seven hundred forty-five thousand, nine hundred fifty".