135820807973 has 8 divisors (see below), whose sum is σ = 140550009600. Its totient is φ = 131094654768.

The previous prime is 135820807933. The next prime is 135820808021. The reversal of 135820807973 is 379708028531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135820807973 - 2²⁸ = 135552372517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135820807933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671261 + ... + 849842.

It is an arithmetic number, because the mean of its divisors is an integer number (17568751200).

Almost surely, 2^135820807973 is an apocalyptic number.

It is an amenable number.

135820807973 is a deficient number, since it is larger than the sum of its proper divisors (4729201627).

135820807973 is a wasteful number, since it uses less digits than its factorization.

135820807973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524211.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 135820807973 in words is "one hundred thirty-five billion, eight hundred twenty million, eight hundred seven thousand, nine hundred seventy-three".