135810803731 has 4 divisors (see below), whose sum is σ = 139481366032. Its totient is φ = 132140241432.

The previous prime is 135810803729. The next prime is 135810803767. The reversal of 135810803731 is 137308018531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135810803731 - 2¹ = 135810803729 is a prime.

It is a super-2 number, since 2×135810803731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135810803131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1835281095 + ... + 1835281168.

It is an arithmetic number, because the mean of its divisors is an integer number (34870341508).

Almost surely, 2^135810803731 is an apocalyptic number.

135810803731 is a deficient number, since it is larger than the sum of its proper divisors (3670562301).

135810803731 is an equidigital number, since it uses as much as digits as its factorization.

135810803731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670562300.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 135810803731 in words is "one hundred thirty-five billion, eight hundred ten million, eight hundred three thousand, seven hundred thirty-one".