135803355779 has 32 divisors (see below), whose sum is σ = 180694778880. Its totient is φ = 99042383232.

The previous prime is 135803355769. The next prime is 135803355797. The reversal of 135803355779 is 977553308531.

It is not a de Polignac number, because 135803355779 - 2²⁴ = 135786578563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135803355769) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 997439 + ... + 1125384.

It is an arithmetic number, because the mean of its divisors is an integer number (5646711840).

Almost surely, 2^135803355779 is an apocalyptic number.

135803355779 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

135803355779 is a deficient number, since it is larger than the sum of its proper divisors (44891423101).

135803355779 is a wasteful number, since it uses less digits than its factorization.

135803355779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122899.

The product of its (nonzero) digits is 11907000, while the sum is 56.

The spelling of 135803355779 in words is "one hundred thirty-five billion, eight hundred three million, three hundred fifty-five thousand, seven hundred seventy-nine".